How do carb restorers clean the outside of the carb?

I've been using an ultrasonic cleaner for around 40 years. I am a pinstriper and clean my brushes and airbrushes in it and have used it religiously for any tool or parts from my car which fits in it, it has a 2 quart tub. To clean tools you'll need the US cleaner with a stainless steel tub, a timer and one without a heater as the water or whatever you use in it will heat itself. I personally use a cleaner called Rapid Remover which is a citric cleaner with D Lemonine, I use it full strength. A good US will set you back a good $175. and getting one at Harbor Freight will just waste your money. Here is a link to my website for anyone interested in my job http://inflite.tripod.com/