Fillers and putties will normally work OK over properly sanded (80-180 grit) cured OEM paint. However, with so many different types of aftermarket paint available (lacquer, enamel, urethane, water-based). We recommend that all paint be removed where filler is to be applied.”

Then, Can you spray self etching primer over body filler?

You should not put etch over or under filler either. If you are applying it before prime and you get a little overspray on your filler work while trying to hit your metal it will be fine. Dont make a point to spray it over filler though.

Considering this, What does filler primer do? Filler primer is a thicker primer that fills in scratches and uneven surfaces before painting. It’s perfect for places like the cut edges of MDF and plywood. Once filled and sanded it will be just as smooth as the rest of the surface.


28 Related Questions and Answers Found 💬

 

What is the difference between epoxy primer and etch primer?

Epoxy primer is catalyzed and self etching is solvent based. Self etching primer bonds well to bare metal surfaces and can be top coated in a short period of time. Epoxy primer can be applied in heavy coats which can be guide coated and block sanded to remove small imperfections in the body.

What is the best primer to use on bare metal?

Two-part epoxy primers go one step further by including zinc phosphate, which increases its corrosion-inhibiting properties. Simply put, epoxy is the best primer for bare metal, making it excellent for newly fabricated metal parts or ones that have been fully stripped.

Do I need etch primer on bare metal?

1. Over Bare, Clean Metal – Epoxy primers are amazing at sealing up bare metal and from allowing moisture or corrosion to creep in. Etch primer included, epoxy primer is about the only bare metal primer you could leave a vehicle outside in without rust forming back under the primer quickly!

Can you spray epoxy primer over old paint?

You can coat epoxy or urethane primers over old paint. I personally would not, but you can. It won’t craze the paint like spraying laquer on old enamel. But you would really be better off just sanding it down to the factory primer, at least.

How big of a dent can you fill with Bondo?

Its OK to use bondo up to 1/4 inch. If it is your pride and joy, I’d do a little more work to reduce the dent. Using Metal-2-metal will make it a little stronger than normal bondo.

Does self etching primer stop rust?

After you remove the rust scales from the metal on your car, you need to apply self etching primer. It’s a mix of phosphoric acid and zinc. It’s purely a surface coating, and it doesn’t stop the rust. It does, however, prevent the rust problem from worsening.

Can you use body filler over rust converter?

Using a rust converter ,acid under the epoxy primer that I‘m using is a no go. The primer I‘m using is Southern Polyurethanes. And they suggest apply the body filler over the primer.

Why is Bondo bad?

Bondo Fiberglass Resin is designed for repairing cars, boats, snowmobiles, jet skis, bathtubs and showers. Bondo Fiberglass Resin is waterproof and is compatible with all paints, including gel coat and marine paints.

Can you put Bondo over paint?

Bondo Ultimate can be applied directly over sanded and cured primer and paint. This filler remains easy to sand for days after the application.

Can I put Bondo over rust converter?

Rust converter converts the rust to primer. You can prime and paint over it. Clean the loose rust off first before converting of course tho. I re-read yes you can bondo over it.

How long before I can sand Bondo?

I’ve used bondo quite a bit. Generally, in a matter if a few minutes it will start to harden and get rubbery. At that point, you can carve it up with a utility knife, a hand planer or a bondo rasp. Just make sure you leave enough to do a final sanding, usually within 10 to 15 minutes you can start sanding it.

How do I prepare for Bondo?

Clean and sand or scuff the surface to prepare it for body filler — it will not adhere to smooth, dirty or oily surfaces. Generally, if paint will stick, so will Bondo. 7. Conversely, if there’s an area you don’t want Bondo to stick to, apply a release agent (see tools and materials) or use Scotch tape or wax paper.

What is the best auto body filler to use?

What does self etching primer do?

About SelfEtching Primer

Rust-Oleum® Self Etching Primer prepares bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the top coat. This product is formulated to stop rust and is an essential step to achieve a professionally finished look.

Can you paint over Bondo?

Clean and sand or scuff the surface to prepare it for body filler — it will not adhere to smooth, dirty or oily surfaces. Generally, if paint will stick, so will Bondo. Fully cured Bondo is harder than soft pine, and is not flexible.

Can you put body filler over polyester primer?

After applying the poly prime, block it. If you need more fill for low spots,just use polyester filler or polyester glaze. Polyester prime is basically thin body filler so theres nothing wrong with putting the filler over the prime. Just make sure its sanded with 80-100 grit where you put you filler.

Can you Bondo over old Bondo?

Yes, you can layer bondo over bondo as much as necessary with no problem.

How do you paint over body filler?

Thread: painting over body filler

They need to be primered with a fill primer (not epoxy). If you don’t prime the filler then the filler will absorb the paint, which will end up looking like a bullseye in the paint after you’re done.

How big of a dent can you fill with Bondo?

Its OK to use bondo up to 1/4 inch. If it is your pride and joy, I’d do a little more work to reduce the dent. Using Metal-2-metal will make it a little stronger than normal bondo.

Why is Bondo bad?

Filler primers

In most cases, the filler primer or high-build primer is also a urethane product. Because it has the texture to fill pits and imperfections in the sheet metal, an unsanded primer coat would be too rough to paint over without further preparation, which includes a sealing primer.

What is the best auto body filler to use?

Some coats of a good primer will make it even stronger. Any time you sand away from your vehicle’s paint and expose bare metal, you should apply primer before you paint, sanding lightly between coats to be sure you‘ve got a smooth surface every time.

What is the best fiberglass body filler?

7 Best Car Body Fillers – Reviews
?PRODUCT ?FEATURES
1. 3M Bondo 261 (Best Overall) Quantity – 14 ounces Super easy to use Cures up fast Highly durable and non-shrinking
2. Evercoat 156 (Best Value) Quantity – 101 ounces Superior adhesion Excellent for heavy filling Clog-free formulation

Will Bondo stick to primer?

Can you apply body filler or bondo over primer filler? Yes. You CAN apply over sanded 2k primer, or bare metal. Be sure to have the area sanded with at least a 150 so the filler has some TOOTH to grab to.

Will Bondo stick to primer?

Filler has long been a standby for repairing small car dents. For one, Bondo that is mixed too thickly can crack, harming rather than improving the look of the car. Additionally, there’s a risk of discoloration and poor long-term wear when you use a filler like Bondo.

HOW LONG WILL body filler last?

You only want to mix what you can use in about 10 minutes. Properly mixed, body filler will begin to thicken in 10-15 minutes, and be fully cured in 30.

Will Bondo adhere to concrete?

The products can be used to repair and restore aluminum, wood, concrete, brick, metal, fiberglass, stone and sheet rock. You might try mixing Bondo with a little bit of concrete mix or sand to mimic the texture.

Can you putty over paint?

No, you have remove the paint by using paint remover or just scrap it down, and you can directly apply Wall putty or you can use wall primer and then wall putty. If you apply on paint, it wont last for long, it will peel off in 1 or 2 years.

How do you get Bondo off paint?

If its on Paint, I would suggest using a plastic type paint scrapper (or anything made of strong plastic so you won’t scrape the paint), put it on the base of the bondo spot, but not touching the paint, and giving it a good wack. If there’s wax on the paint, it will pop off.

Do you need to primer before painting a car?

The products can be used to repair and restore aluminum, wood, concrete, brick, metal, fiberglass, stone and sheet rock. You might try mixing Bondo with a little bit of concrete mix or sand to mimic the texture.

Should I prime before body filler?

We use 36 grit grinding disks to clean and texture the metal before applying filler. You can even use something as fine as 80 grit, just be sure to push the filler into the scratches so that it bonds well. No priming or etching is needed as long as the metal is textured and not rusted.

Can you put body filler over polyester primer?

Some coats of a good primer will make it even stronger. Any time you sand away from your vehicle’s paint and expose bare metal, you should apply primer before you paint, sanding lightly between coats to be sure you‘ve got a smooth surface every time.