I read that wax is always supposed to be applied in the direction of wind over the body, straight. However, porter cable is random orbital and I would have no qualms about using it on black.
Local guy was selling clear side markers for $15 and a like new sport exhaust dual tip for $100. I already have the dual tip option on my 2007 Base (they are kind of oval shaped) so I switched them out for the fun of it to see if I like the round ones. Oh and I cleaned out my cabin filter. If the new dual tips don't work out I'll sell them here and someone with get an awesome deal too (they listed for $430). I'll post pics at some point.