I've got a gallon of ARO that I've used a little bit. So far its worked great. I just bought a gallon of Megs APC. Seems that the APC can do most everything that the ARO can but for a lot less $$$.
The only thing I'm not sure about between the two is ARO is supposed to be good for vinyl/conv...
I got a sample of DP Extreme Foam that seemed to work real good. This most recent time I used a little of my CG citrus wash n gloss and it seemed to work just as good too. What do you guys use in your foam guns?