I have worked in the autobody field for 17 years and before that I detailed cars for 10 years. I have found that the best wax is a paint sealer. I put it on with a 6 inch d/a wax/polisher let it sit until you see a haze and it wipes right off. Last way longer than a regular wax. I can't remember the brand but most automotive stores will carry it. You could also check at an autobody supply store.
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