Re: Krylon or Rustoleum for gun paint job?
I've never used Rustoleum, but have used Krylon. The flat camo paints work great, dry fast, and are very flat. The only downside is that just about any gun cleaner, solvent, ect will take it off pretty easily, plus the tan colors show finger prints and smudges pretty bad.
I use Brownell's Alumahyde alot now as it does really well and holds up great. It takes a good soaking of Acetone before it will come off. The best bet with the Alumahyde is to pre-heat the parts in the oven at 250 degrees or so for 10-15 minutes and spray one complete coat immediately, then put back in the oven for an hour or two at 200 degrees or so. Let it cool and you're pretty much good to go. If you don't pre-heat the parts the alumahyde will take forever to cure and never turn out right.
As far as any general prep no matter what paint you use is to spray the parts down with brake parts cleaner, tape off whatever you need to, then lightly wipe down with solvent or more brake parts and a microfiber cloth to remove any lint or additional debris. Heat, paint, cure, back in action.