Hi all,,,just picked up a paint gun I am borrowing from my stepdad. He stole it from GM before he retired. It is a DeVilbiss. a few questions for you pro painters.

1. is this an acceptable gun to use on all finishes (i.e. primer, basecoat, clearcoat)?
2. What are the two adjustments on the back of the handle?
3. what products and proceedures to you recomend for cleaning?
3. any other tips, comments,,concerns,,bitches gripes moans and complaints are also welcome.
http://www.clubchopper.com/photopost...080632-med.JPG