Don't try to sprinkle nonskid on 2 part paints unless you test it on scrap. A lot of these paints are really poor adhesives. The nonskid just will not stick. You have to mix the 2.
I have a crater shapped spot on my Tornado because I tried that
Anytime you try a project like this you should always pratice on some scrap.
Some paints do flash quickly which might cause adhesion problems. Of course all paints are not created equal.
I've used Imron to do both methods and have had no problems. This stuff sticks and is sticky.