These have been stored for many years. I would say since the 60's so it takes a bit to get off.
In my case for these, it was close to dry and crusty.
You can use mineral spirts, diesel fuel ,karosene, and other petro forms to pre soak such as I did.
I brushed off excess, then Poured boiling soapy water in a container with them in it.
Fumes were never inside the house.
Did a repeat of this twice and it worked great. Re-oiled mags and springs and back to 100%, and full.
Springs was removed during this process and third Mag was in the soak before I thought to take pics.
Eric
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