Re: spray paint over POR15 for topcoat OK?
I cannot definitely answer you question of spraying over por 15. However, if you find out it is ok then don't use Rustoleum. I had used rustoleum for years on semi frames and it fades and is a short life product. For a few dollars more use Valspar metal enamel. It holds color much better, last longer and covers exceptionally well. It's rustoleum on steroids.
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