Just Plain Dave wrote: ↑Mon Jun 14, 2021 7:51 pm
That Buick is AWESOME.
I have had more painting trouble.
The one that really got me was a 64 Chevelle that I painted white.
It looked pretty good so I thought I would clear coat it.
About 3 seconds after the clear coat the paint alligatored.
What type of paint were you using(white base and clear)?Mixing types of paint doesn't usually work well;and even using paint of the same manufacturer can be problematic.If by "alligatoring" you mean the paint started separating into pieces and lifting ,a couple of things can cause this.
Spraying lacquer over an enamel base that hasn't cured.Most aerosol paints are either lacquer based or acrylic enamel.The exception is Rust-O-Leum which is alklyd enamel and you usually can't spray ANYTHING over it.
Spraying the base coat on too heavy and adding multiple coats before the first coat has had sufficient time to dry. This will also cause a condition known as,"solvent pop" which is the driers working their way up to the surface through the layers of paint.
Incompatibility between base and clear.
Sometimes the clear top coat has,"hotter"(chemically)solvents than the base paint which will cause the paint to separate.This can happen even with paints of the same manufacturer. I used to have this problem occasionally when shooting clear over 1-Shot lettering and striping paint. It was originally an alklyd enamel although the formula has been changed so many times now due to EPA regs I have no idea what it is now.My clear coats were always a catalyzed polyurethane based and if you didn't use a certain technique they would wrinkle. As you had a very narrow window to work with due to the catalyst(about 1 hour)you had to be precise or risk damaging everything. I had all my prep work done before I mixed the clear top coat. I would then apply a very thin,"tack" coat and let it dry for 10-15 minutes.This would create a,"barrier" between the final coat which was laid on "wet". A second tack coat and wait another 10-15 minutes before laying down the final wet coat.Most of the time there was no lifting of the paint.
