RAPTOR can be topcoated, but generally, it’s not needed. RAPTOR dries to a semi-gloss/eggshell finish, which most people find to be plenty of gloss. Clearcoats do not have the same level of durability as RAPTOR and are more likely to chip under heavy duty use.
Lightly abrade fully cured RAPTOR with a grey scuff pad. U-POL 2K clearcoats use the same resin system as RAPTOR so U-POL clearcoats will give the best results.