[mylife]

Put it in a black garbage sack and set it in the sun on a hot day.

You’ll be surprised what oozes out.
Then just wipe it down with paper towels.

[2111USMC]

I inadvertently did something similar to that.

I keep it in one of those inexpensive hard black plastic shell cases with the foam padding inside.

One hot afternoon at the range, I opened it up and found an outline of the gun in cosmoline soaked into the padding.

:)