I've used the 303 aerospace on my 1980 cj 5 rubber fenders and dash and it seems to work very well. I've been using it on my '06 xterra to try to combat the sun-fading.

Yeah - al ot of hte Back to Black stuff works great at first...and then as time passes, it actually makes it fade more (Years worth).

The bumper paint is a good idea, but I'm still a big fan of just replacing everything plastic with real metal.