I use whatever rv wash solution spouse picked up and a one of spouse's ladders and a soft brush on an extended pole. I'll probably wax it this summer, it's always in the shop so exposure to elements (esp the sun) is greatly reduced when not on a trip.
Polished the front metal rock guard as well as touched up the toyhauler rails with some "rust proof" spray paint where I gouged and nicked it with my equipment.
Do yoy.love on the west side of WA? How do you think you got algae (or moss?) on your trailer?
2012 FR Flagstaff T12SDTH
1996 Shadowcruiser Pop Up Truck Camper
1967 Newell Motorcoach
2003 Ford F150 5.4 V8 Triton Super Cab
2004 Nissan Titan LE 5.6 V8 4x4 Crew Cab