Picked up a '76 vintage 10/22 to use as a host for a build.
The stock was nasty... so bad that I had to strip it to just get the gunk off it.
Receiver internals and trigger group the same.
My usuall trick of hosing it out w/ carb cleaner or brake cleaner worked... sorta. But there is still some nasty looking stuff....
A toothbrush w/ Breakfree CLP didn't seem to really touch what was left....
Think a soak in mineral spirits and some scrubbing with a brush would take care of it? I've cleaned some nasty dirty guns using a buddy's parts washer before but it was "fresh" after a long shooting session....
If not mineral spirits, what would you recommend? No access to a parts washer anymore, no access to an ultrasonic cleaner anymore...
This stuff does not appear to be powder residue...