Give it a decontamination wash and you should be able to use more PBL Surface Coating. Or use the PBL Coating Booster they suggest for topping it.
By the way, the direct Pinnacle Wax site has a 40% off sale as of this posting. I just picked up PBL Coating Booster, PBL Surface Cleansing Polish, and PBL Leather and Vinyl Coating to go along with the PBL Glass, Wheel, Paint, and Surface Coatings I already had.