Gonna do it.  I forgot to order their reducer, do I need their product or what thinner can i use from the craft, hardware and or hobby shop????

i just used a cheap airbrush and airbrush compressor, didnt need to thin it.  i think acetone or mek will clean it up.  you could also go to sherwin williams and ask them.  

Hi I have done about 8 rifles and pistols and scopes. With colt gray and coyote brown. I have never used there reducer. Just follow there instructions. I use carb spray to clean up the air brush after. Works great. Try somthing like a old mag light to get a feel for it. Its very easy to use just take your time and make sure your parts are clean and dry. For mesureing get a set of Stanless steel spoons. The carb spray washed away the size markings on my plastic ones. You will be amaszed at how much you can do with a little 4oz bottle. If its cold were you are use a hair dryer to warm up and speed dry time. Also if you are useing a propelent can for air brush keep it in some warm or hot water. So that it wont freze up on you.