I was over at my dad's house the other day, right after a wax job on my car, and he keeps on finding little spots of wax left over (especially in the little cracks and crevasses in the spoiler, moulding, and "formula" badges.) He has an '02 WS6 that is the same color as my formula, so he is used to this problem as well. He goes over to the cabinet in his garage and pulls out an old toothbrush. Works GREAT. Stiff enough to remove the wax no problem, but no where close to being stiff enough to harm the finish. Just a little tip that might help somebody out (I know it saved me some time!)
Gotta love the old school F-Body freaks!