Agreed, the nature of cocoa butter is to be a pain and need frequent warming, the brand doesn't matter.
Your compressor sounds more than adequate, I just switched to a 1 hp 2 gallon and am noticing a huge difference in the amount of coverage I'm getting. Really helps with larger pieces like Easter eggs. I am able to get a splatter when I want it by turning the pressure way down but it doesn't take much pressure to get good coverage.
An airbrush artist I talked to recently said it's not so much the size of the compressor but the Cubic Feet per MInute and recommended at least 1 CFM with the Grex 0.7mm.
