As others have noted, washing will be your primary means of maintenance. OC does claim to be a permanent coating, i personally prefer to refer to it as semi-permanent, simply because A. It CAN be removed and B. Even when taken extremely good care of, after 2-3 years, more than likely you will want to polish and re-coat it IF you want to keep it looking its absolute best.So this has probably been answered elsewhere and I missed it but... With opti-coat pro, what kind of upkeep do you have to do to the finish? Do you only have to wash? Or do you ever have to wax or polish it? Thanks!