We have done dozens of trucks up here with a few light coats on black and clear over it. Wax them and care for them like any other painted surface. Works great for the third brake light too.
You can see it here on the Hemi I have for sale.
http://www.competitiondiesel.com/forums/showthread.php?t=22830
roskoe those look great I think a little more black would be better but still nice I need to find me some of the older tail lights for my truck the smoth ones look killer black.