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Relic Forum

Cleaning shell frags?

Hi;

I read with great interest the fire and oil cleaning techniques for iron relics. Has anyone tried this with shell frags? I dug some large frags (2" thick) and tried electrolysis to remove the rust but noticed that some of the frag was turning to gray mush too. Shell frags a composite? Would the fire treatment work or would I run into problems with them cracking?

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