Etch primer - overpainting

[Oldmogman]

Has anyone used etch primer before?

I've not used it before but I'm assuming it's OK to spray over it with normal primer once it's properly dry?

There are a few light scratches in the metal I'm hoping to lose with a coat of high-build primer over the etch primer.

Any hints and tips would be much appreciated!

Thanks all!

[howard jones]

Hi
Etch primer is acid based and is the best base coat to put onto new metal or well cleaned-up rusted areas. A high build primer is as good as any 'next coat' and will help to fill any light scratches - you won't have any reaction with primer. Just be careful if you are using an aerosol, high build primer normally chucks a lot of paint out at once, a bit more than the usual ''misty'' spray.

[chickenjohn]

Yes you can use normal primer over etch primer with no problems.

BUT, if the metal surface has scratched on it, especially scratches you can feel, high build primer will not disguise these.

You will need to do more prep, sand the area before etch priming with 80, then 120 then 180/240 grit paper to remove the scratches. If they are still there then you may need a thin coat of stopper filler to fill the scratches, then sand and prime again.

[Oldmogman]

Thanks John

Do you mean fill or stopper the scratches THEN use the etch primer, or the other way around?

cheers