One shop where I worked had an ultrasonic cleaner. Take off the grips, drop the gun in, and it came out CLEAN. Save a lot of time in disassembly/reassembly.
We didn't trust it with plastic parts and of course not with wood. That was before all the polymer guns so I don't know if it would hurt them or not, though I doubt it.
As to cost, remember that stuff sold as gun related is often jacked up in price even though the same stuff is sold elsewhere. Try an industrial supply or auto supply catalog; a lot of auto shops have sonic cleaners.
Jim
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