I had my old mustang tinted at a shop that wet-sanded my rear window so that the tint would stick to the dot matrix. The tint looked really good in the back, but they didn't sand the front window where the horse is. The tint in the front lifted up and didn't look that nice. I want to take the cobra to a different shop, but I want to wet-sand all the matrix pieces before hand. What grit do you guys recommend for sanding??? Has anybody else sanded theirs?