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Old 27th Jun 2019, 1:01 pm   #3
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,901
Default Re: Polishing aluminium

That looks like it goes deep and is indicative of poor grade aluminium sheet in the first place. Be careful, the stuff may be seriously lacking strength n the affected areas.

David
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