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Originally Posted by haycait911
1. what solution are other guys using? barring commercial types, they're a pain to get here.
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Ultrasonic cleaners work by cavitation rather than the solution you put in there, they are basically detergent and wetting agents intended to reduce surface tension so that the really small bubbles can form - it's those microscopic bubbles exploding that does all the work:
Ultrasonic cleaning - Wikipedia, the free encyclopedia
I just use dish soap. Definitely works better than plan water. Also, the one I bought (rather smaller than yours!) has a heater (68F); the hotter solution does seem to be more effective.
I agree that it's surprising how effective they can be; almost all of what I thought was rust on some CIS injectors turned out to be baked-on fuel varnish or something and came off. The big advantage is how it can clean areas you just can't get at, of course...
If you want to make aluminum look "new" again without media blasting, try a fiberglass pen (3M make them, they're used to clean circuit board traces etc). They''ll have a dirty penny looking shiny and new - without flattening out any of the lettering or detail on the coin.