Wicked works great for automotive. I use the 4012 high performance reducer. (which I always use anyway, for every surface from board to leather).It has a high percentage of pigment so the colour looks great when cleared, but the high pigment is what some folks don't like as you need to reduce more, and build up the layers.
The trans (detail) paints pop better so I use those and either paint an area white first if needed over a dark background, or do a white under painting first.
Just scuff the base and go, I never use any inter coats or anything, though you can, and then just clear with a 2k, usually U-pol.