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On our 2000 Montana 2750 I used a marine wax designed for fiberglass. I would wax twice a year and when we sold this trailer in Oct 2004 it still had a great gloss on it.
For our new 3475, I've had a contractor (works through our dealer) apply a permashine type of product. He won't say what it is but I know others who have had this product applied over the past few years and they love it. The contractor says it should be redone about every 3-4 years and do not wax it in between. The application was done yesterday and I saw it. It looked real good.
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