does that require a metal PRIMER b4 the actual painting? or is the BRAKE CALIPER PAINT REACTOR act as the primer???? I just got the kit and it didnt come with a METAL PRIMER... I WANNA PAINT MY BRAKES QUICK!! tell me howw!! haha i read the HOW TO PAINT BRAKE CALIPERs.... but i dunno if the G2 kit requires a METAL PRIMER... the directions doesnt mention anything about metal primer... so tell what should i do? should i just buy the metal primer?