Bob Duckworth <WB4MNF@atl.org> wrote:
It's Phosphoric acid.
Iron Oxide (rust) > Iron Phosphate (the hard shiney stuff)
It can be bought at stores like NAPA, etc in small bottles, but it is
fairly spendy (3 or 4 bucks a bottle) but I understand it is available
in it's generic name at chemical houses in 5 gallon buckets for about
the same amount.
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It is also sold under the name Ospho and can be purchased at many paint
stores.
Rod, W5HVV
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