Mine's black too & I put on a lot of highway miles, the paint on my front end/hood looks horrible, may end up getting it repainted.
I just used
zaino products on my car for the 1st time last weekend, results were pretty impressive. There are other multi-step product lines out there that I'm sure are really good as well.
I used the clay bar 1st, then used a porter-cable buffer with an orange cutting pad and used zaino z-pc swirl remover. It did a nice job of removing swirl marks and some of the minor scratches. Of course, it wouldn't do anything on the deep scratches or stone chips, not aware of any product that will take care of those. Followed up with the z5 wax, resulted in really slippery paint and a mirror finish. I have the z2 wax for the final step, but ran out of time to apply it last weekend. I'm going to apply it this fri. before I leave for the midwest meet in des moines.