While my Coupe was in for an engine overhaul the mechanic washed the engine as it was taken off and some white spots are evident on the aluminum in the front of the plane presumably from overspray of the engine cleaner. Tried cleaning it off with aluminum polish (Nuvite F7) and a couple others and the white spots (look like water spots) remain. Any suggestions for getting the spots off w/o hurting the aluminum (i.e., over polishing). Thanks for any advice. Rich Green N3881H
