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-   -   Bubbled powder coat on pot metal (https://www.hotrodders.com/forum/bubbled-powder-coat-pot-metal-474849.html)

belchfire 04-16-2017 01:18 PM

Bubbled powder coat on pot metal
 
Since the chrome on my headlight rings and trim is shot I decided to do black chrome powder coat. I've done some of the interior pieces that are steel with good results. The trim not so much. I blasted, washed with acetone, and baked at 250*. Coated and cooked according to instructions. I've got a lot of little bubbles and it looks like hell. I tried sanding them down & re coating but the same thing happens. Is there a primer PC that I could use? I had it happen on an intake manifold too put I didn't pre-heat so it's not unexpected.

OneMoreTime 04-18-2017 08:52 AM

I think the pot metal has pores in it and those pores will hold contaminent. I would sand it again to let the solvents out, let it set or prebake it again and repeat. Not sure but worth a try on my world..

Sam

belchfire 04-18-2017 04:55 PM

I found a sandable PC primer and ordered it. Baybe this will fill the pits and seal it. I used the hi-temp lab metal on some of the dings and it works good. If it still bubbles there's an out gassing primer that might work.

AutoGear 02-15-2018 10:53 AM

What was the answer to this situation? I'm looking to have several trim pieces on my henry j powdercoated.

Nathan

belchfire 02-15-2018 05:10 PM

No luck so far. I've done it 4X and it gets better but still not perfect. Sometimes instead of bashing the part with a hammer, I'll set aside for awhile. This is one of those times. I might try the outgassing primer but not today.


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