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I got some aluminum panels sprayed with Powder coat but I have to paint 2 inches strip over the power coat. I wonder if someone know what kind of paint should I use to be sure that has good adhesion and that is not to aggressive to the Powder coat. Probably to be sure about the adhesion I need just to sand to remove the shining and use kind of water base primer to be sure to don't be too aggressive
A good, safe option is an oil based enamel. It cures slowly (several hours, whole day, depending on brand) but it won't attack the powder coat... at least no powder coat that I've ever encountered.
Just scuff the powder coat first with some 320.
I suggest Sherwin Williams All-Surface oil based enamel. It is my go-to oil base when durability is the top criteria. If I need to thin it, I prefer high-flash naptha, also available at SW.
Thank you Matt, unfortunately I can spray only water base. Seen to me if I will sand the powder coat before end spray water base primer it should work
Then try Sherwin Williams Waterbased Precatalyzed Epoxy.
It's more like a wall paint in terms of thickness, but cures a little quicker, no mixing needed (one can). Water cleanup, can be sprayed or brushed.
The only real negative is that it takes it about 30 days to reach a full "enamel" like hardness. It dries to the touch fairly quickly and can be handled/shipped next day in most cases..... but that final hard cure just takes time.