Hear is a tip. Whenever you experience pitted aluminum, the cause could be
is embedded salt, which is quite a corrosive. If so, the corrosion will
continue even after recoating correctly with paint or powdercoating. The tip
is to thoroughly wash the aluminum with vinegar, then water, let dry and
then apply your paint or powder scheme. It works.
Steve


"EASI54" wrote in message
...

Hi Everyone! Thanks for all the responses for my Bondo faring
question.

After sand blasting my aluminum hull, the shallow areas of faring that
remained exposed the bare aluminum of the hull and in some spots there
was this indication of electroloysis or decavitation of the metal that
can be described as "pock marked".

Other than cutting out the damaged area and rewelding, is there any
other approach to repairing the aluminum?

John




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EASI54