Need paint help

[Sam Mac]

Guys

I need some advice on painting. The last couple days I started to paint the fenders for a 1641. I wet sanded the powder coat, primed it with Rustolium rusty metal primer and sprayed it with Valspar Cub Yellow. No problems so far. This AM when I got it in better light I noticed that I had a couple areas that needed another coat for good coverage so I started to spray another coat, this is when it went bad. The paint started to wrinkle. I stopped and let it sit, later in the day I wet sanded the whole thing. Now do I need to re prime it or can I just hit it again with the Yellow? Thanks in advance.

Sam

[J-Mech]

Have you ever: used the Rustoleum over powder coat, layed Valspar over Rustoleum?

I'm thinking one of the paints isn't compatible. I've had paint do that when I mixed brands. I don't know that you need to re-prime, but you may need to put a non-bare metal primer over the rusty metal primer. Does the Rustoleum seem to be well bonded?

[Sam Mac]

Originally Posted by J-Mech

Have you ever: used the Rustoleum over powder coat, layed Valspar over Rustoleum?

I'm thinking one of the paints isn't compatible. I've had paint do that when I mixed brands. I don't know that you need to re-prime, but you may need to put a non-bare metal primer over the rusty metal primer. Does the Rustoleum seem to be well bonded?

John

I've use Valspar over Rustolium rusty metal primer many times with no issue this was Valspar over Valspar. Most of my stuff is rusty to start, gives the primer something to bite on LMAO

[J-Mech]

Hmmmm. Are you using cans? Or a paint gun?

[Sam Mac]

Cans, I think what happened is that what I put on yesterday had setup on the surface but the new coat I put on today started to dissolve the first coat and caused the wrinkles.

[J-Mech]

That is possible. May just have gotten a bad can too. You know how factory's are I think I'd just try shooting it again. If if does it again, try wet sanding between coats.

[johncub7172]

Originally Posted by Sam Mac

Guys

I need some advice on painting. The last couple days I started to paint the fenders for a 1641. I wet sanded the powder coat, primed it with Rustolium rusty metal primer and sprayed it with Valspar Cub Yellow. No problems so far. This AM when I got it in better light I noticed that I had a couple areas that needed another coat for good coverage so I started to spray another coat, this is when it went bad. The paint started to wrinkle. I stopped and let it sit, later in the day I wet sanded the whole thing. Now do I need to re prime it or can I just hit it again with the Yellow? Thanks in advance.

Sam

Sam, Glad it turned out! I just wanted to add, that yellow is by far, the worst color to cover,....it flat out sucks. I think what might have happened was the paint "lifted". On most parts, by the time I finish one coat, I'm right back on the previous part with another coat until the yellow has covered. I had to sand out the wrinkles when it happened to me. I would not have concerned myself unless bare metal was showing after sanding, or to build back up the sanded area, would I have used a primer. Temperature differences can cause wrinkle problems too.

[Sam Mac]

Originally Posted by mjsoldcub

maybe this thread is dead, but i was just reading, and if anybody wondering; often times most enamels will have a minimum re-coating time..say " do not recoat for 48-72hrs" if last coat has dried for a certain period of time. it is exactly what you thought sam mac...this is called alagation or alligator..previous coat may not seem wet, and even dry, although uncured, and as the coat on top starts to cure, it reacts and shrinks..enamels take along time to cure as opposed to uerethanes, laquers and such...when working with enamels i tend to do all my top coating in one day...im no expert, but have been "squirting" for about 15yrs..if this helps at all.

Originally Posted by johncub7172

Sam, Glad it turned out! I just wanted to add, that yellow is by far, the worst color to cover,....it flat out sucks. I think what might have happened was the paint "lifted". On most parts, by the time I finish one coat, I'm right back on the previous part with another coat until the yellow has covered. I had to sand out the wrinkles when it happened to me. I would not have concerned myself unless bare metal was showing after sanding, or to build back up the sanded area, would I have used a primer. Temperature differences can cause wrinkle problems too.

Thanks guys.

In the future I'll do all the yellow at one time, and ditto on yellow not covering.

[Leadslingingdaddy]

What was the temp in the shop?

[mjsoldcub]

no problem, you guys help me out all the time!! nice looking cub by the way!! came out good...