need some help....I detailed my car this month....I applied 1 coat of 4 Star pre wax cleaner and 1 coat of 4 Star total protection....and 2 coats of S100..the car looks great...now after 3 to 4 months..... if I want to add a coat of 4 Star total protection....or S100 do I need to take the old wax off....... .