Yes I use it all the time. I start with a bucket of soap,bleach,Ajax or Oxiclean and hot water on the roof with a long handle brush. Then power wash the roof and all the AC covers etc. It gets off all the mold and black streaks. Then do the sides. Just use common sense around decals clean at 90 degrees. I have the Zeps treatment on mine and even at 2 ins away it will not remove the Zeps let alone affect the FG or decals. I also use it to clean under the MH, grease of the front end and drive shaft fittings etc and dirt off of the frames and wheel wells. The one on sale is probably electric and 1500 psi or less, buy you will use it for cleaning other things also. We live in America so everyone thinks differently, some change oil every 3000 miles or yearly some feel more comfortable and go twice as long.