Napoleon Solo

Has anybody painted over POR-15 with success? If so, what are the prep steps? I assume I need to blow on a primer first. I am wanting to spray my firewall so that I can get the body on the chassis over the next few days. Do I have to scuff up the finish? It's pretty shiny.

Any help would be great.

Thanks!

Olds64

I touched up the POR-15 on my engine with some parts store engine paint in the same color range. All I did was cleaned the engine really good where I applied the paint and let it dry properly before starting the engine. It worked great.

70cutty

from their website:
"TO TOPCOAT A FULLY CURED POR-15 SURFACE:
Wet sand with 320 grit until gloss is dull, then paint, or use POR-15 Tie-Coat Primer directly on the cured POR-15 surface, then topcoat as desired."

Allan R

Good info. I need to touch up some areas where brake fluid leaked all over the new POR painted frame and UCA.

MDchanic

70Cutty's got it.

That stuff's impermeable. Best bet is to paint over it before it's fully dry.
Anything else is hit or miss.

- Eric

Napoleon Solo

Thanks for the info gents. I read the same thing from their website but it seemed like they were pushing their own etching primer as a solution. So if I scuff up the coating I should be able to blow on some single stage paint sans primer? At least it's not white paint over black POR-15, it's gunmetal grey.

That would be ideal.

Allan R

Actually it isn't Eric. It's subject to the same release as using paint stripper. Brake fluid dripping on it gives the same unfortunate result, in which case it can simply be wiped off with a shop towel. Don't ask.... But for the op, a a scuff and respray should work well.

joe_padavano

^^^THIS! This is exactly what several POR vendors have told me. You can definitely scuff it after it's completely dry, but the paint is hard and that's a lot of work. Everyone I've talked to says to wait for the POR to get tacky then fog on a coat of regular primer. After that dries, paint away.

Napoleon Solo

Too late...Fully cured.

joe_padavano

Sandpaper and elbow grease. Have fun.