We have had our Mh stored indoors for years, many years and not much problem but in April our storage facility was sold. In Tn we had lots of rain. Washed before leaving i late My for Michigan lots of rain and streaks, washed there again, Came home to new storage, but outside. Lots of white on sides and windows. On way to Az lots of hard rain in Texas. Got to Az and cleaned bu not top. Bathed it a few days ago. No spotless and no rain in sight, but dust every where. The sealant is killed by the sun and heat. No heat.It's down right cold at night. When we head back east will have it wased again top to bottom. $65.00 top sides spray waxed and hand dried and tires dressed.
At home it is 100.00 and over and not including the top. A new inside storage unit is awaiting us and though costly the roof and everything else will be protected and not so many streaks.
It rained most of the spring and summer at home. So unlike most of time it is wet.