I don't know. I don't follow the rules. I have put every kind of paint over every other kind of paint, and only encountered very rare problems.
Gas out only really applies if you put some over a paint that does gas out.
As far as rattle cans you really can't beat Tamiya Synthetic Lacquers. Good stuff.
Airbrushing is a whole nother animal where some rules start to apply for best results. I tend to stick with enamels for airbrushing mostly, but I occationally use Testors acrylics. Overall, however, acrylics and I don't get along that well.
But I have airbrushed everything from Testors enamels to W&N artist oils, acrylics, rub-n-buffs, and water colors from tubes
The whole thing and trick is to try stuff, experiment, what works for one person doesn't always work for everyone else.
The problem is if you just listen to the pros you get afraid to try stuff outside the box you put yourself in. That is where you will miss out on all kinds of little tricks and techniques that take you to the next level.
So my advice is take any advice as a guide with a grain of salt.