Paint Failure?

erik winkler · Post by **erik winkler** » Sat Jan 31, 2009 10:34 am

What happened here?

I have a mailbox which I wanted to decorate.
Removed all the old paint with sandpaper, degreased it with special enviromental friendly waterbased decreaser painters use and after that with some solvents.
Than i painted the mailbox completely with One Shot enamel, added some One Shot hardener and let it dry.

A few weeks later (today) I thought of making some extra decoration, by cutting a mask of Avery cast vinyl.
When I pulled the vinyl and even the half-tacky masking tape, all the paint came of!

What did I do wrong?

Should I have primed it first? What kind of primer?
I thought One Shot enamel was the best paint to adhere on metal (this was galvanised steel by the way).

Roderick Treece · Post by **Roderick Treece** » Sat Jan 31, 2009 6:56 pm

Eric,
Galvinized metal needs it's own special primer first. We have something here Galvaprep.

RT

Kent Smith · Post by **Kent Smith** » Sat Jan 31, 2009 10:30 pm

Eric, there are three types of primers that will solve the problem. The best and most environmentally friendly primer would be an acrylic, preferrably waterborne. The pure acrylic resins have a good surface tension which allows it to adhere well to the metal and will allow any top coat paint to adhere well to it. I don't know what you have available but be sure you use a primer, not a topcoat.

erik winkler · Post by **erik winkler** » Sun Feb 01, 2009 3:12 am

Rod, Kent and James,

Thanks I new it must have been something simple.
Will use that special primer.