On Sat, 26 Nov 2016 21:48:20 -0500, Alex wrote:

Has anyone used an ultrasonic cleaner for their guns - or boat parts?

I bought one and I'm clear on the cleaning part but have read a lot of
opinions on the best way to lubricate the parts after they are cleaned.

I would put mineral spirits with a dash of oil in my cleaner. When the
mineral spirits evaporates away, you still end up with a uniform oil
coating. Then wipe all the oil off that you can, knowing it is still
there on the microscopic level. When assembling the gun, lube the
operating surfaces as normal but too much is as bad or worse than none
at all.