The only caution is if one wants to paint
or do a fiberglass repair. In that case you have to really make sure 100% of the Zep wax and any residue is removed. Ammonia, & soapy water mix, Zep makes a remover has been reported to work. I would test in inconspicuous area first. Also the self serve coin operated car wash tire white wall setting is reported to remove the wax. Again I would test for yourself before going all out with it.
I have found that a good cleaning allows me to re-apply a couple or three coats to "freshen" it as needed. Mine is outside storage and the wax takes a beating, plus I get road and farm dirt on it.