I'm going to be using Rub 'n Buff (silver) on some plastic pieces I'm assembling, and I have a few questions. Do you need to use primer under RnB? I know with silver paint a black primer gives a better result. Since RnB is wax-based, does primer even matter? Second question. From what I've read RnB can be sealed. I've seen Future floor wax (acrylic), cheap enamel spray sealants, and the makers of RnB even sell a sealant. What are people's experiences with the various sealants? I'm not looking for a highly chromed finished, more of an aluminium appearance, and as the final product will be directly against material, sealing is going to a must if I want to be sure of the finish remaining on the piece.