I am looking at pressure washers after hand washing our 21'9" trailer. Please suggest a pressure washer or how is best to clean the outside of the travel trailer.:h
Soft brush and dawn. If it is really dirty then elbow grease. I would not use a PW on my rv, will cause leaks and damage to graphics. Once it is clean, put good coat of polish and then wash it regularly. Good coat of polish annually helps keep it cleaner and easier to keep clean.