I got a set of Devilblis finish line guns for christmas and now need to shot primer. I bought some 2K Crossfire Epoxy primer from Napa but have some questions. First off before I spray, do I need to wipe the metal down with anything, ie thinner or acetone? Next, what size tip do I use in gun? Lastly, I saw a show where they said you can practice spraying on a piece of cardboard but don't remember what they said to spray, thinner or something else. Thanks for any advice.
