The Krylon is a perfect match to the grey epoxy primer, the Por-15 is not. If you sand the metal till it is bright and shiny, and feather the edges of the epoxy you can do an invisible repair. It should last as long as Por-15 if you can get the metal clean. You could also if you want use a phospated metal cleaner just before you paint if you think you have to. I use Por-15 on metal that is so rough and hard to clean that you can't get into all of the pits and crevices so you can never be sure it is clean enough for anything else to stick and stay on. Of course you can use the Por-15 and then go over it with the Krylon to cover it. David teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, jwit6@xxxx wrote: > Dave, > Why would you consider using Krylon spray paint instead of POR-15 in Grey? > > ". Sand the metal to remove > >any rust and feather the edges and then paint with Krylon "Smoke > >Grey". .>vin 10757 > > > >.