Would rattle can paint last as a topcoat over POR-15 ?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-03-2004, 05:47 PM
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Would rattle can paint last as a topcoat over POR-15 ??

I have my hotrod frame painted with POR-15 but would like to topcoat it with this awesome rich plum gloss (purple) rattle can paint made by Krylon. Has anyone ever used POR-15's "tie coat primer" or know if I could use this Krylon brand paint over it? Let's here some opinions. THANKS......

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Old 11-03-2004, 09:56 PM
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i wouldnt do that because the spray can paint is most likely to flake off you could probly get that same color from ppg and you could get a cheap paint gun at your parts store it would last longer and look better
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Old 11-04-2004, 07:16 AM
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I used some rattle can paint over the por-15 on my daily driver. It flaked off within a month.

kev
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Old 11-04-2004, 08:50 AM
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You need to use Tie Coat primer. POR sells it. Use some 400 grit, scuff the por and top it with tiecoat. POR is hard to sand but the tiecoat is nice to sand. If you topcoat POR-15 it will always peel or flake off. You must use the Tiecoat primer.
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Old 11-04-2004, 10:29 AM
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Can you powdercoat over POR-15 for a truly rust proof underbody?
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Old 11-04-2004, 11:25 AM
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No need to. POR-15 is a total seal product that does not allow a moisture exchange once cured. I also believe a powdercoat oven exceeds the temp range for POR-15. It would most likely bubble. I did the underbody of my mustang with POR-15 process and while it was still tacky I shot some PPG DP 50 (epoxy primer red oxide) over it. Restomotive Labs suggested this method would be fine instead of using the Tiecoat primer after it cured.
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Old 11-05-2004, 11:29 AM
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Rattle can over POR 15 while tacky worked fine on our Jeep....
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Old 02-08-2005, 05:14 PM
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Restomotive Labs has just come out with an etch primer that is to be applied over cured POR-15. This primer can be top-coated with the paint of your choice. The primer comes is spray cans and quarts.
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