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If your flip over's vinyl window are becoming hazed from oxidation, try wiping them with some Aerospace 303 Protectant. Makes the windows extremely clear
some folks rave about Meguiar's® PlastX™https://www.meguiars.com/automotive/products/meguiarsr-plastxtm-clear-plastic-cleaner-polish-g12310-10-oz-liquid
jbird68 that is quite an improvement ...hard to beat them results.
If like to find a small electric buffing tool. All that "wax on, wax off" little circles takes a little time. Just haven't found one yet. Maybe one of those electric face scrubbers.lol