I just used plasti-dip on my badges and emblems. I'm not a fan of the plastic chrome either. I used a coat of plasti-dip silver metalizer after the black. gives it a bit of sparkle in the sun. No real prep work was required, once the badges were off I cleaned them with some alcohol, made sure they were dry and sprayed on the first coat. I think I did 2 coats of black and a coat of metalizer.
Here's my thread with pics