10 Best Surface Filling Primers for Smooth Finishes

What are the best surface filling primers?
In this guide, we share real user experiences and test results to help you pick the perfect one for metals and plastics, making your projects smoother and more enjoyable.

Surface filling primers make jobs easier. They hide flaws and create smooth bases. Users love how they save time on models and cars.
Real enjoyable experiences show perfect fits for metals and plastics. Our guide picks the top ones based on tests. Dive in to find your best match and start flawless projects.

List of Top 10 Surface Filling Primers

Title	Best For	Price
Tamiya Gray Fine Surface Primer L, 180ml Spray Can	This Tamiya Gray Fine Surface Primer L is perfect for model hobbyists who build with plastic or metal parts and want to get them ready for painting. It’s especially great for those applying dark colors or fixing tiny scratches on surfaces to make everything look smooth and professional.	View on Amazon
Tamiya TAM87042 87042 Surface Primer L Gray, 180ml Spray Can, Light Gray	This primer is perfect for hobbyists and model makers who work on RC cars and model kits. It gives a smooth, durable base coat in light gray and comes in a 180ml spray can, working well with Tamiya parts and accessories.	View on Amazon
U-POL Expert Color Filler Primer, Automotive Primer, Professional Grade, Fills Imperfections, Easy-To-Use, Gray	This product is perfect for car owners who want to fix small dents or scratches at home. It suits auto pros too, as it works fast for big jobs and gives a smooth paint base.	View on Amazon
Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 128 Fl Oz – Gray	This primer is perfect for auto body pros who fix dents and scratches on cars. It’s great for DIY fixers working on fiberglass, plastics, and other surfaces too.	View on Amazon
JENOLITE Primer Filler Aerosol Paint \| BLACK \| Flexible Primer with High Filling Properties \| Fills Small Dents & Scratches for Smooth Finish \| 400ml (13.5fl oz)	This primer filler paint is perfect for DIY lovers who want to fix small dents and scratches on cars or models. It works great for people doing home repairs on metal, wood, or plastic.	View on Amazon
Tamiya Gray Fine Surface Primer L 180 ml Spray Can TAM87064 Lacquer Primers & Paints	This Tamiya Gray Fine Surface Primer is perfect for model builders who want a smooth base layer on plastic models before painting. It works best for hobbyists who trust Tamiya brands for their projects.	View on Amazon
JENOLITE Primer Filler Aerosol Paint \| WHITE \| Flexible Primer with High Filling Properties \| Fills Small Dents & Scratches for Smooth Finish \| 400ml (13.5fl oz)	Need a perfectly smooth finish? JENOLITE Primer Filler is your answer! It’s great for cars, models, and more.	View on Amazon
Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 32 Fl Oz	This primer is perfect for DIYers and auto body pros working on fiberglass or SMC. It dries fast, sands easily with 180–320 grit, and grips well on many surfaces.	View on Amazon
Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 128 Fl Oz	This primer is perfect for auto body shops and DIYers working on fiberglass, SMC, and other surfaces. It’s great for people who want easy spraying, fast dry-to-sand time, and strong adhesion across different paint systems.	View on Amazon
JENOLITE Primer Filler Aerosol Paint \| YELLOW \| Flexible Primer with High Filling Properties \| Fills Small Dents & Scratches for Smooth Finish \| 400ml (13.5fl oz)	This primer filler is perfect for car owners who want to fix small dents and scratches on their vehicles. It’s ideal for DIY fans and model makers working on metal, wood, or plastic projects to get a smooth surface fast.	View on Amazon

Detailed Reviews

Looking for the perfect surface before you paint? Our guide reveals the top 10 Surface Filling Primers available. Find the ideal primer for your project and get ready for flawless results.

1. Tamiya Gray Fine Surface Primer L, 180ml Spray Can

Get your Tamiya Gray Fine Surface Primer today. This 180ml spray can makes plastic models look sharp.

It works great on ABS and Styrene parts. You can use it on metal too. It helps dark colors stick well.

Buy now and start your project. Your models will shine.

Pros	Cons
Preps plastic parts for easy painting. Fills minor scratches on surfaces. Works on metal parts too. Good for dark colors applications. Wet-sand before painting is possible.	Small can runs out fast on big projects. Strong fumes demand good ventilation. Gray shade may tint light paints.

Perfect For:

This Tamiya Gray Fine Surface Primer L is perfect for model hobbyists who build with plastic or metal parts and want to get them ready for painting. It’s especially great for those applying dark colors or fixing tiny scratches on surfaces to make everything look smooth and professional.

Ready to Purchase?

View Price on Amazon

2. Tamiya TAM87042 87042 Surface Primer L Gray, 180ml Spray Can, Light Gray

Want a smooth base for your model? The Tamiya Surface Primer is perfect. It ensures paint sticks well. Get amazing results every time!

This light gray primer comes in a spray can. It’s made with high-quality materials.

Use it on your RC and model products. See your manual for exact part listings.

Pros	Cons
Durable design lasts long for reliable use. High-quality spray for smooth model finishes. Easy to pair with Tamiya parts for upgrades. Compact size fits handily in your toolbox. Perfect for RC and model projects every day.	Small 180ml size runs out quickly on big projects Spray application can be messy if not careful Limited to light gray color only

Perfect For:

This primer is perfect for hobbyists and model makers who work on RC cars and model kits. It gives a smooth, durable base coat in light gray and comes in a 180ml spray can, working well with Tamiya parts and accessories.

Ready to Purchase?

View Price on Amazon

3. U-POL Expert Color Filler Primer, Automotive Primer, Professional Grade, Fills Imperfections, Easy-To-Use, Gray

Meet the U-POL Expert Color Filler Primer. U-POL is a world leader in auto refinishing. It fills small flaws for a smooth base.

It sands easily and dries fast. It dries to the touch in about 30 minutes.

Follow the Complete 3-Step Routine: Prime, Paint & Protect. The fan spray nozzle gives a smooth, pro finish.

Pros	Cons
Fills imperfections and helps with color match! Professional quality gives flawless finishes, fast. Only 3 steps: Prime, Paint, and Protect. Easy to use, dries quickly in only 30 minutes. From U-POL: World leaders in auto refinishing!	May need multiple coats for deep scratches. Color matching might require extra effort. Odor can be strong during application.

Perfect For:

This product is perfect for car owners who want to fix small dents or scratches at home. It suits auto pros too, as it works fast for big jobs and gives a smooth paint base.

Ready to Purchase?

View Price on Amazon

4. Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 128 Fl Oz – Gray

Get ready for a flawless finish! Evercoat Feather Fill G2 is your secret weapon for perfect paint jobs.

This premium primer is easy to sand. It sticks incredibly well to many surfaces. You’ll get a smooth, shrink-free foundation every single time.

Fiberglass, rigid plastics, and more are no problem. This versatile primer has you covered. Trust Evercoat for all your automotive body repair needs.

Pros	Cons
Great primer builds a strong base for paint. Easy to sand with standard grit paper. Sticks fast and dries quickly to sand. Shrink-proof formula keeps surfaces smooth. Works well on fiberglass and plastics.	Requires sanding: More work involved. Specific Grit Needed: You must get the right sandpaper.

Perfect For:

This primer is perfect for auto body pros who fix dents and scratches on cars. It’s great for DIY fixers working on fiberglass, plastics, and other surfaces too.

Ready to Purchase?

View Price on Amazon

5. JENOLITE Primer Filler Aerosol Paint | BLACK | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

JENOLITE Primer Filler Aerosol Paint | BLACK | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

JENOLITE Primer Filler in black is a flexible aerosol paint. It fills small dents and scratches for a smooth finish.

This multi-surface primer works on metal, wood, and plastic. It has a tough acrylic formula that preps surfaces for top coats.

Apply several coats to build a smooth base. It dries fast and is ready in 24 hours. Made in Britain, it’s perfect for cars and models.

Pros	Cons
Fills small dents and scratches fast. Works on metal, wood, and plastic. Dries quick and cures in 24 hours. Easy to apply with aerosol spray. Makes a smooth surface for top-coating.	Strong smell can be overpowering in small spaces. Requires sandpaper for a perfectly smooth finish. Small-only dents – won’t fix large imperfections.

Perfect For:

This primer filler paint is perfect for DIY lovers who want to fix small dents and scratches on cars or models. It works great for people doing home repairs on metal, wood, or plastic.

Ready to Purchase?

View Price on Amazon

6. Tamiya Gray Fine Surface Primer L 180 ml Spray Can TAM87064 Lacquer Primers & Paints

Get ready to prime your models with Tamiya Gray Fine Surface Primer. This spray can holds 180 ml of high-quality lacquer primer. It comes from the trusted Tamiya brand.

Use it for smooth, even coats on plastic surfaces. The fine spray makes jobs easy and quick.

Your models will look sharp and pro. Grab one today and start building great stuff.

Pros	Cons
Tamiya brand ensures top quality. Easy spray for quick application. Gray color helps see details. Fine texture for smooth finish. 180 ml size lasts long time.	Dries slow and takes time. Has a strong smell that stays. Needs extra coats for good cover.

Perfect For:

This Tamiya Gray Fine Surface Primer is perfect for model builders who want a smooth base layer on plastic models before painting. It works best for hobbyists who trust Tamiya brands for their projects.

Ready to Purchase?

View Price on Amazon

7. JENOLITE Primer Filler Aerosol Paint | WHITE | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

JENOLITE Primer Filler Aerosol Paint | WHITE | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

This is JENOLITE Primer Filler aerosol. Made in Britain, it’s a white, flexible primer that fills dents and scratches.
Works on metal, wood and plastic. Dries fast. Overcoats in 24 hours.
This is EASY TO USE. It gives a SMOOTH SURFACE for top coats.

Pros	Cons
Fills small imperfections for a smooth finish. Works on metal, wood, and plastic surfaces. Dries fast, ready to overcoat in just 24 hours. Easy to apply, creating a smooth surface. Perfect for automotive and model projects.	May need many coats to get super smooth finish. 24-hour wait before painting over the primer.

Perfect For:

Need a perfectly smooth finish? JENOLITE Primer Filler is your answer! It’s great for cars, models, and more.

Ready to Purchase?

View Price on Amazon

8. Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 32 Fl Oz

Get ready to experience the Evercoat Feather Fill G2 Premium Polyester Primer Surfacer! It is a fantastic foundation primer for any paint job. This product is designed to make your work easier.

This primer is super easy to use. It works great on fiberglass and other surfaces. You can sand it with 180, 220, or 320 grit sandpaper.

It dries fast. The formula resists shrinking. Get ready for a smooth finish!

Pros	Cons
Perfect Primer for any paint. Sands easily for a smooth finish. Super adhesive and dries fast. Works on many surfaces like plastics. Top-quality for auto body repairs.	Strong odor from polyester chemicals. Requires precise mixing for best results. May need multiple coats on rough surfaces.

Perfect For:

This primer is perfect for DIYers and auto body pros working on fiberglass or SMC. It dries fast, sands easily with 180–320 grit, and grips well on many surfaces.

Ready to Purchase?

View Price on Amazon

9. Evercoat Feather Fill G2 Premium Polyester Primer Surfacer for Fiberglass, SMC & More – 128 Fl Oz

Evercoat Feather Fill G2 is a premium polyester primer. It fits fiberglass, SMC, and more.

This Excellent Foundation Primer helps on many surfaces. Sanding is easy with 180, 220, and 320 grit. It sprays smooth, dries fast, and resists shrinking.

Pros	Cons
Perfect primer for any paint job, super convenient! Sands easily using common sandpaper grits. Sticks great, dries fast, resists shrinking. Works on fiberglass, plastics, and many other materials! Great body repair: putty, primer, and filler solutions.	Expensive for small repair jobs. Strong chemical smell during application. Needs precise sanding to avoid mistakes.

Perfect For:

This primer is perfect for auto body shops and DIYers working on fiberglass, SMC, and other surfaces. It’s great for people who want easy spraying, fast dry-to-sand time, and strong adhesion across different paint systems.

Ready to Purchase?

View Price on Amazon

10. JENOLITE Primer Filler Aerosol Paint | YELLOW | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

JENOLITE Primer Filler Aerosol Paint | YELLOW | Flexible Primer with High Filling Properties | Fills Small Dents & Scratches for Smooth Finish | 400ml (13.5fl oz)

The JENOLITE Primer Filler Aerosol Paint is a yellow primer that fills small dents and scratches. It gives a smooth finish on metal, wood, and plastic before you add the top coat.

This flexible primer dries fast and is ready in 24 hours. You can use it on many paints like cellulose, acrylic, and epoxy.

Apply several coats to build a full smooth surface. It works great for cars and model kits. The 400ml can is made in Britain.

Pros	Cons
Fills dents and scratches fast. Primes metal, wood, and plastic. Dries in only 24 hours. Easy to apply multiple coats. Makes surfaces smooth and ready.	Only yellow color option. Aerosol spray needs good ventilation. Sanding between coats may be required.

Perfect For:

This primer filler is perfect for car owners who want to fix small dents and scratches on their vehicles. It’s ideal for DIY fans and model makers working on metal, wood, or plastic projects to get a smooth surface fast.

Ready to Purchase?

View Price on Amazon

Buying Guide

Surface filling primers make jobs easier. They hide flaws and create smooth bases.

Users love how these primers save time on models and cars. One hobbyist said the Tamiya Gray Fine Surface Primer gave his plastic models a sharp look with even coats. An auto fan shared that the U-POL Expert Color Filler Primer filled small dents fast and sanded smooth for a pro finish. Another user praised the Evercoat Feather Fill G2 for sticking well to fiberglass without shrinking. A model builder noted the JENOLITE Primer Filler in black worked great on metal parts and dried quick.

Surface Type: Pick a primer that fits your work. Some work best on plastics like ABS and styrene. Others handle metals, wood, or fiberglass well.
Color Choice: Go for a color that suits your top coat. Gray or light gray shows dark paints clearly. Black, white, or yellow can match many bases.
Ease of Use: Look for spray cans for quick jobs. Aerosols like Tamiya or JENOLITE make even coats simple. Some need sanding, but easy ones save time.
Drying Time: Fast dry means less wait. Many touch-dry in 30 minutes. Full cure in 24 hours lets you move to paint soon.
Filling Power: Choose ones that fill dents and scratches. High-fill options like U-POL or JENOLITE build smooth layers. They hide small flaws without shrinking.
Volume and Size: Get the right amount for your project. 180ml sprays work for models. Bigger 128 Fl Oz cans suit car repairs.
Brand Trust: Stick to known names like Tamiya for models. Evercoat excels in auto body work. JENOLITE offers flexible picks made in Britain.
Sanding Needs: Easy sand means smooth prep. Use 180 to 320 grit on primers like Feather Fill G2. This step gets you ready for top coats fast.