Here in the south everything mildews or rust. The north side of the house mildew forms on the vynil siding and on the north side of the trailer.
Redneck solution, 1/2 gal bleach, 1 gal. water, a couple onces of dish washing deterget. Put in a pump up garden sprayer, and spay down the trailer, about 6' at a time, tuffer stains use a kitchen spunge mop. Then hose it off. Sometimes requires 2 applications, but removes rust stains and black streaks.
Zip.
15 yr. old Haulmark trailer
before
after, no mop used just spray on and hosed off, would be better if i used a mop.
