[gearhead]

If possible have someone with another water hose rinsing the sides of the trailer while you clean. Rinse a whole lot more afterwards. Rinse some more early morning the next day. Then wash as usual. You really don't want that white chalky roof material left on the trailer and the sun baking it for 6 months. It is very very difficult to remove. Some places it may be impossible. Does it sound like I know about this first hand? Uh huh, yes I do.