Airbrush cleaning –
I just never let mine get too dirty and created a little trick of going outside with a can of carburetor cleaner with the little red plastic tube. The tube fits just in the back where the needle has been removed. Still hooked up to air and shoot it in and air trigger it out. Then repeat the process in the sink with dish washing detergent. Done.
I have has the same air brushes for years and years of various qualities and orifices. Same for real artist brushes, I have had the same ones for easily 20 years just adding to the collection and losing few over time.
In comparison, I met one sign guy who was doing some really great work at a time when I was trying to get super detail out of a micron level air brush. It turned out he also had been doing this for years and had a cheap single action airbrush he bought back when they were $19. It was disgusting looking and you couldn't tell there was an air brush in that glob at all.
Lots of my airbrush collection came from people buying them and not cleaning them then the second time it is dead so they are officially out of the air brushing hobby.
Then there is the guy who puts out so many square feet he just throws them away and picks up another like some kind of military reload. But, I guess he is making enough money to do that.
I will caution you on submerging and leaving them submerged. There are seals at the back end of the paint trough inside the air brush. For auto paint we switch them out to telflon. Once clean, I put a little vaseline on the needle and always get some strange comment about why I have such a thing in the studio. The main purpose is to keep these seals from drying and sticking to the needle and tearing a bit when you grab it after some time.
That sonic thing seems a little whimpy to me. Oh sure, lets just sit here in a gentle vibration of ultasonic frequency like an air brush spa or something. Whats next? Give them a little milk bath and some cocoa butter? A little airbrush fragrance? New airbrush smell?
Then you can make little airbrush houses with beds and tuck them in and sing songs to them. put on little plays. Hello mister double action! Ola senoir single action how are you today. Oh senoir, your needle looks a little abraided, what happened?
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.