How do I clean dirt stains from a 50 year old aluminum roof without damaging the finish on the roof?

Question

The dirt stains originated from a large maple tree that overhung the roof. When the tree had to be removed the stains became very obvious.

Answer 1

PRESSURE WASHER.OR TRY SOLVENT WIPE WITH PAINT THINNER,NAPTHA,OR WHATEVER DISSOLVES THE SAP?IF ITS JUST DIRT,DETERGNT & WATER BRUSH SHOULD DO.