At this moment I'm taking a break from painting and wanted to post a few thoughts on the use of HVLP. As I've said in another thread here at VAF I have never used an HVLP spray gun but have been present during the use of them many times. My project has come to the point of wiring and my decision was that it was finally time to paint the interior and then return to the installation of wire. So I spent a day and cleaned out the interior of two and a half years worth of sub assemblies (exaggeration) and began masking. My plan is to use Lt. Machine Gray Rustoleum on the interior parts and in fact have sprayed the tip up parts with rattle can Lt. Machine Gray. Having already procured bulk Lt. Machine Gray I was ready to get my gun out and start. Problem was my spray gun, a high pressure model, was in need of a rebuild requiring a few new seals. Necessary parts as I found out were not available locally and needed to be ordered. When I've got the bug to get something done I don't like waiting around so I decided a new spray gun was in order. I decided it was time to put up or shut so HVLP would be the way to go. I settled on a mid range Warwick HVLP setup for pressure pot use. In this case I want to use my pressure pot rather than a gravity feed since I can see that I 'll be needing to use my gun for prolonged periods of time upside down and at weird angles. With everything setup and ready to go I opened up my can of Lt. Machine Gray only to find that it's about as thick as honey. Reading the can I followed, rather loosely, the directions for thinning and began spraying some of the smaller more hidden parts that I'd removed from the fuselage. That was last night and it was a disaster, I have never seen Orange peel that so closely resembled an Orange in my life. I came home a good deal depressed and Googled ?Rustoleum HVLP? and found a lot of information by people using the combination to paint cars. Long story short it became obvious to me that even though I thought I had I hadn't thinned the paint nearly enough. Another problem found in the search was that thinning to a high degree causes the paint to stay soft for a VERY long time. Armed with my new information I set a plan of action. Per one half gallon of Rustoleum I thinned with one pint of acetone then added to the material actually being used in the pressure pot (one quart) one ounce Japan dryer. Making sure at the time of spraying to have no more than 40 psi delivered to the gun and less than 10 psi at the nozzle I once again began shooting. This time after fiddling some with the settings on the gun the paint laid on quite a bit more smoothly with, as far as I could tell, no over spray. At the time that I left (about an hour and a half ago) the paint seemed to be setting up very nicely. The quality of the coating isn't dead smooth but it is very acceptable for my interior work. However, you rest assured if the coating were on the outside I'd be stripping it off. Overall I think I am sold on HVLP.