Question: Can You Paint Directly Over Self Etching Primer?

What is the difference between self etching primer and regular primer?

A primer that is self-etching is normally considered a high-build coating (HBC).

HBCs are formulated to only require one coat to complete the job (source).

Self-etching primer is thick and typically only needs one coat before you can move on to the topcoat..

Do you need self etching primer on bare metal?

After you remove the rust scales from the metal on your car, you need to apply self etching primer. It does, however, prevent the rust problem from worsening. … You need to make sure that you apply self etching primer to bare metal that’s been thoroughly cleaned in order for it to be fully effective.

What’s the best primer for bare metal?

epoxy primersTwo-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.

Is etching primer necessary?

imo its way better than any self etching primer and provides better corrosion protection.. If it’s been sitting and/or has some surface rust you can use a rust converter prior to the epoxy primer. Etch primer is good but not necessary as long as you get rid of the light rust first.

What happens if you paint metal without primer?

Without the use of a primer, in many cases, oxidation will begin leading to rust and the eventual decay of the metal. In addition, the chemical makeup of paint is less binding than primer meaning it will flake off easier without a primer underneath it.

How long should self etching primer dry before painting?

For best adhesion, apply 2 or 3 thin coats and allow each coat to dry for 2 minutes before applying the next coat. Allow the final coat of Self Etching Primer to dry for a minimum of 3-4 hours before dry sanding, or 15 minutes before wet sanding with #400 grit sandpaper.

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. Etch is for adhesion to metal, nothing more nothing less.

Do I need etch primer on bare metal?

Note self etch primer is out of fashion. Most people these days will use an epoxy primer instead which sticks well and is waterproof so you don’t need to apply top coat quite so quickly. Self etch primer (was) recommended for bare steel, aluminium or GRP, and it won’t flake off like a filler primer can.

What do you put on bare metal before painting?

The Best Way to Paint Bare MetalTo prep and paint metal you’ll need shop rags, acetone, scuffing pad, self-etching primer, and your choice of spray paint. … The first step in painting metal is to thoroughly clean it. … After scuffing the metal, it’s ready to be primed. … Let the primer dry thoroughly based on the manufacturers suggestion before painting.More items…•

Do you rub down primer before paint?

Primer is pourus, as long as you let it harden properly and thoroughly dry it afterwards it should be fine, I always wet flat between stages when I’m using rattle cans. Btw I’d go with at least 800-1000 before top coat personally mate. That way you’ll get a really smooth surface ready for basecoat.

Do you have to prime over self etching primer?

Do you have to prime over self etching primer? You can’t paint directly over etch primer. You need a surfacer or other primer/sealer over it.

Can you paint 2k over etch primer?

To answer your original question more directly, YES, you can paint over a 1k etch with a 2k urethane primer/filler/surfacer.

What kind of primer should I use on metal?

galvanized primerWhile a rust converter is ideal for preventing rust from recurring and making a rusted surface easier to paint, a galvanized primer is appropriate for metals (e.g. aluminum) that prevent paint from adhering to the surface.

Does etch primer need to be sanded?

In any complete restoration or body repair project, you will to sand primer at one point or another. However, most manufacturers of self-etching primer, due to the acid base of the products, don’t recommend directly sanding the self-etching primer.