Can I apply wax or water repellent on top of the crystal coat using a polisher?
A. If the Wondax -1 coat is completely dry and hardened, there should be no problem in applying a second or third product (wax, water repellent) on top of the Wondax -1 coat even with a hand polisher. HOWEVER, for the same reasons mentioned in Q5, the frictional heat generated from the hand polisher may thin or weaken the Wondax -1 coat so it is recommended that you apply additional products to the Wondax -1 coat by hand.