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2012 HMS Shannon Obverse
Posted: Fri Nov 27, 2020 4:40 pm
by altakid
Re: 2012 HMS Shannon Obverse
Posted: Sat Nov 28, 2020 8:50 am
by troubadour
a chemical can do this
PMD damage.
Re: 2012 HMS Shannon Obverse
Posted: Sat Nov 28, 2020 4:00 pm
by altakid
Thanks Troubadour
That's what I thought too, but can't figure out the rust. I think I will try a little alcohol on it.
Re: 2012 HMS Shannon Obverse
Posted: Sat Nov 28, 2020 5:17 pm
by coinguy
It can't be rust showing. Those cores are made of brass plated aluminum bronze, neither of which can rust.
It just must be the chemical reaction.