We had our steel T-hangar modified to accommodate the large tail feathers of N114DT. Without us realizing, a fine powder of steel showered down from the widened roof onto the horizontal stabilizer. It must have been there for some time, because it has now rust-welded itself to the paint. Apart from a strip and respray, any ideas on how to remove it?

I am tempted to try an oxidized paint-removing polish and electric polisher, but is there something better?

Dawn Darling
N114DT, KMYF