paint dried airbrush

True, but the problem with LT and acetone is their colloidal properties; they tend to promote stuff coming off in clumps which makes cleaning the inside of an airbrush a little tougher. You're better off emulsifying the clog with the least vitriolic chemical first and then using laquer thinner for a final douche. hth

The Keeper (of too much crap!)

Including, probably, a few internal plastic parts and seals...