Hi, Jenny, Not sure if you saw the existing forum post about airbrushes and those brands that people prefer. It does not answer your single-action vs. double-action question clearly, but it does address what brands people are using and their experience with them. Link here: http://cookieconnection.juliau...-the-best-one-to-get
I'm leaving your question here, but hope people will focus on the single-action vs, double-action question, since the brand question is addressed elsewhere.
Just trying to keep the forum topics clean and clear. Thanks for the great question!