I am not suggesting doing this for the roof but two ways to convert insoluble iron oxide( rust ) to a soluble form that is removed with a water rinse is to use either oxalic acid ( 5% solution on the rust for about 30 minutes( can wet towels so it adheres and does not run off) in water or a commercial product called "Iron Out" which is sodium hydrosulfide I think.

." - Lee Iacocca"We are continually faced by great opportunities brilliantly disguised as insoluble problems." - Lee Iacocca"So what do we do?

Certain sections of the asphalt had originally been laid over excavations and this caused these sections to sink and allow water, snow, and ice to accumulate on the pavement.5) slurry-sealing (a process of applying a watery mixture of insoluble matter) a parking lot.

This property seems to be cheap but a low priced property will not compensate you for insoluble management headaches if you are so far away. if you want to buy a building, buy one you can drive to within half an hour.