A few years ago, I decided to repaint the drive train shield plate on our Gen II's. Aside from the usual two scrapes that were present on all Gen I and Gen II Vipers that I have been under, there were some extra scrapes from a midrise lift. I sanded the plates with a sander, washed and degreased them, applied Rustoleum Automotive Primer, then several coats of Rustoleum Gloss Protective Enamel. So far, they still look good!!
If you are really "picky", consider some of Eastwood's gloss, semi-gloss, or satin blacks to "match" the surrounding areas.