I know everyone has had good luck with the Bar Keepers cleanser, but I was too lazy to go out and look for it. I experemented with cleaners that I had on hand at the shop. I found that Mean Green cleaner and degreaser mixed with Clorox worked perfectly. All of the chalking, mildew, tree sap and any stains lifted off with minimal work. I tried using the scotch brite scrub pads and also used a stiff bristle scrub brush, getting the same results with both. I applied the solution on to the camper with a pump stlye tank sprayer in sections, let it soak for a couple of minutes then scrubbed it with the brush. Areas that needed more attention were scrubbed with the scouring pad, but not the entire camper. I have done this with the last 3 campers, 2 being Burros and one a Casita
, and both achieved a high gloss shine. Note that none of the campers I have done had any factory gell coat shine left, they were all pretty flat white when I started. I am assuming that if you have a partially shiny camper that you will have to scuff the surface with the scotch brite pads to dull the shine so that the Red Max Pro will adhere to the camper. I have had nothing but good luck with this product, and even recently applied it to my fathers 1989 Bass Boat. His boat looks like new again also and being submerged in water for hours at a time does not have any afect on it.
This is just my 2 cents worth. If your camper is as dull as my past Burros, you may not have as hard a time prepping it as you had thought. I completed the camper pictured in about 5 hours, but that was allowing extra dry time between coats due to the temperature in February. With temp above 60 degrees, the finish dries as fast as you can go around the trailer with no delay for dry time!