I have a pole barn that has a galvanized corrugated steel roof. Last year
the roof started to get some rust in a few spots. After this winter there is
a lot of rust showing on the roof.

Is there any roof coating that will either slow down or stop the rusting? I
don't want to replace the roof at this time and would like to try and cover
it up as well as stop or slow the rusting down.

Any suggestions?

Thanks,
Brian