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I have the same 22 Revenge that VA whaler has, and decided to do something similar to what your saying. I started by covering the entire interior roof with white tinted epoxy resin, as thick as possible. It made it look better, but it was no where near smooth. Wanting to avoid a ton of sanding and re-epoxying I decided it looked good enough, and just painted it, with fairly good results. Not perfect, but I would consider it a cleaner installation than the headliner.