Surf City Garage makes a product called Black Max
It is a vinyl, rubber and trim dressing. I love the stuff. Even covers old white areas where I didn't get the wax off properly quite well. It seems to protect, and goes on very easily.
As an aside..... I use their car wash, and recently on a trip back to California, wanted to get another coat of protection on from the salt slush here in Utah... I tried their paint sealer, then glaze. Man, that stuff is DA KINE
And easy to apply/remove.....