When she left, my ex had a bunch of art stuff in her closet. I packed it all away in the storeroom until she gets around to needing it (Not going to throw it away, I spent good money on that stuff!)
Anyway, among the stuff up there, I ran across this:
Photos don’t do it justice. It’s not “chrome” but it’s definitely metal. Think Mandalorian helmet. Here’s an example. Two “coins”. Both engraved on black acrylic. Left has white acrylic paint rubbed into the cuts, right is sprayed with the Krylon paint.
This might show it a little better:
Not only does it LOOK like metal when sprayed on acrylic, but it also makes a really neat effect where the acrylic is engraved.