I have heard that works very well.Robert try some dish soap or laundry soap 1st. It's handy, won't take much time and you may be surprised with the results.
Is there any reason why I couldn't run a couple of 1911 mags in an ultrasonic cleaner filled with trichloroethelene? The mags seem to be all metal and I'd never put anything remotely resembling plastic in trichloro. They're pretty dirty. After cleaning, do you lube them at all?