I have used Mequires for all my RVs and boats that have a gel coat. Annually, I start with either #44 or #49 for oxidation and bad black streaks. Be careful with these as they are very powerful. I then use #50 on the entire RV, including decals. This product will work on normal black streaks. It is a cleaner and a polish. I then use #56, pure wax, on the entire RV, including decals. Two complete applications usually takes me about 8-12 hours. I have had no decal problems and my boat and RV look absolutely great.
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