Re: which clear coat after krylon
I've been trying different paints on metal surfaces lately, hoping to find a low cost, easy maintenance option to some of the "higher end" spray on finishes like Ceracoat and Duracoat. So far I've tried Krylon, which was given the recommend "do not touch" time, but as soon as it came in contact with some Breakfree lube, it peeled away and gummed up.
Next was Aluma-hyde II. Application went well until I applied the matte clear coat, because for some reason it left a very glossy finish. Not my first time spray painting anything so I think the temperature may be at fault since So. Cal. is rather cold and wet this week. No biggie, I knocked the shine off with extra fine steel wool and didn't scratch anything at all which was encouraging. After the recommended "do not touch" time again, I experimented by putting several different brands of copper and powder solvents, and gun lubricants on there just to see what would happen. The first test, I poured it on the metal piece and wiped right off. No negative effect which I liked. Waited a few more days and this time, I let the liquid sit on there for a minute then wiped off. This time the AH II started bubbling and peeled off... Sigh...
As a disclaimer, all testing parts were thoroughly scuffed up and degreased with Acetone and Brake cleaner (no residue)
To the OP, think about applying either Duracoat matte clear on top or something else more durable. As another much wiser member had said to me, you should lay down a good foundation like Duracoat or Ceracoat in base color, and then apply Krylon over that, and then clear coat, this way when you get rid of Krylon the stuff underneath will stay. Matte clear over Krylon will help, but if the Krylon chips it takes the clear coat with it.
My next test will be Ceracoat C-series on Aluminum Oxide blasted surface and another piece with just sanding with Aluminum oxide coated paper and degrease.
I've applied Duracoat on a pistol of mine before. So far none of my solvents and gun lubricants I use on a regular basis can harm it, and that was on a sanded surface, not blasted. So I know that'll work.