---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Thu 01/12/06: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:17 AM - Re: Need help with HVLP gun (Snow, Daniel A.) ________________________________ Message 1 _____________________________________ Time: 05:17:36 AM PST US Subject: RV9-List: RE: Need help with HVLP gun From: "Snow, Daniel A." --> RV9-List message posted by: "Snow, Daniel A." Bob, I have a similar setup and called AFS when I had the same problem. They instructed me to do two very important things: 1) Increase air pressure such that you maintain the required air pressure at the gun with the trigger pulled continuously. That may mean turning the pressure up to 50-60 psi at the tank. 2) Thin, thin, thin. I don't have a viscosity cup, so the guy at AFS told me to thin it up to about 2 parts paint to 1 part water. Of course you probably already know to just barely fog the pieces with the first pass, wait 3-5 minutes and lightly spray in the perpendicular direction, wait 3-5 minutes and lightly spray, etc. I don't have the numbers here at work, so I suggest you call AFS. The owner is very friendly and willing to spend time explaining how to use his products. Good luck. Daniel Snow RV-9A wings finished, waiting for slow-build fuse Jacksonville, AL Time: 04:10:54 PM PST US From: "Bob Smith" Subject: RV9-List: Need help with HVLP gun --> RV9-List message posted by: "Bob Smith" I got a new HVLP gun (Alltrade from Costco) and attempted to use it this weekend to prime some parts for my ailerons. Unfortunately, I could not get a good spray pattern out of it. It seemed no matter what I tried, it would only spray a very week, splattery pattern - the paint did not atomize very well at all. I'm using AFS water-based primer, BTW. Pressure was at 40 psi, then increased to 45 (the gun says use max of 43). I did not thin the primer because I've had good luck spraying it straight out of the bottle in the past with my high-pressure touch-up gun. I ended up finishing the job with my old gun, which does a good job, but I was hoping to significantly reduce the overspray and amount of paint vapor in the air (and wasted paint). The little pamphlet that came with the gun was of little help; I tried its recommendations for changing the flow and pressure. Anybody here have experience with a top-feed HVLP gun that could give me some pointers? Thanks much, Bob Smith