My teeny little airbrush compressor can't keep up with a gun so I can't use one, sprayed it on with a large airbrush (0.8) and it went on okay.
What I did find though was it's coming off much easier, almost like it doesn't grip, to the extend it started to lift as I was painting with the air going against it, had shown no sign of this when I unmasked the shell. So for now I'll go back to brushing it on. If you work on a light box ( or in front of monitor with a white page full screen
) you can see your cut lines in the latex.
I find the vinyl so hand because I can design in illustrator, I think using them both together is perfect though, it just takes a bit of planning !