i got some touch up paint from the dealership and i was wonder what is the best way to apply it to our cars? i read a few articles online that you can use a tooth pick and not really the original brush that comes with it. i put some on the spots where some rust was forming in a few of the rock dings but the paint just bubbled and stood out so i smoothed it out but when it dried you can see the streak from it. any help please. (confused)