I should be getting my metal one soon, and I'm excited, but I'll admit: I repainted my resin Samaritan within 1 day of getting it. Trivially easy paint job though: Black plastikote primer, silver and brass rub n buff. #0000 steel wool and a rag or two. Easy peasy. I plan to do the same with the metal one.
I masked off the handle, which is actually a pretty nice paint job, and sprayed everything else ultra flat black primer. 2 or 3 coats. Let it dry overnight, then hit it with the steel wool, buffs it up to a nice shine. Then squirt some rub n buff (most is silver, or aged silver, or pewter, your choice) onto a piece of paper, rub a rag into it, just to get a small amount on the rag (you want it to leave a silver smudge when you rub hard on something. That's how little you want on the rag) and hit the edges all over the gun with it.