Glass Plus or other NON-AMMONIA window cleaner and glass wax. I completed this project about three weeks ago and have been out twice and so far it's holding up pretty well. I expect I'll have to buff it about once every three months or so. I store the boat outside and will probably buy a shelter for it to minimize exposure. This last winter was harsh even though I have a good cover, I still got water intrusion. I have to beat the elements this year it's too much work just keeping the moisture at bay.