Buck, there's an article I wrote for Model Car Magazine a while back. Check it out, if you can. It will explain everything in detail.
I use a combination of table salt and rock salt (Kosher salt works well too) and what you do is wet the surface. Sprinkle the salt, use a hair dryer to dry the salt, then spray your coat of paint.
Good luck and post your progress.
Yours, D. Cranky, Ph.D. in Salt Studies!