So today we started priming our truck, we did a test on the box of the truck, we did one side. We started spraying and the primer in a way seemed like it was "webbing." It was also very rough, it was all bumpy too. The gun isn't the most expensive, $140 and we used Duplicolour Primer surfacer with thier reducer. Is my primer to thick?

Does anybody know what the adjustment named "round" does? and the adjustment in the back? How should the spray be, and is it possible to get a wider spread spray?

Please teach me how to do this properly, thx alot guys.

 

without actually seing the end product I cannot say what may have happended, you may have had your air presure to low (to high if it was real dry coming out) the fan set to wide, I dont use any of the cheaper primers such as the duplicolor so I dont know what it even sprays like or mixes

not the best pic, but trying to help

 

Hopefully you did not violate the "golden rule of using equipment", which is to read the instructions at least twice!! Do the instructions not say what the **** labeled"round" does? If not I would return the gun in exchange for one that has complete instructions.

 

true that! I may know alot about painting but I know this when using a new product or new tool that I'm unflamiliar with I read the instructions over and over again! painting is a process unless you have many years under your belt that you cant really skimp on.

Would you fly a plane without first getting or at least reading the instructions? I think not!

good point bradshaw

 

WHat was the temperature when you were spraying? It's 100 here today. At that temp your going to have problems. Did you try reducing it a little more? Primer surfacer is not going to lay down very flat unless you get it real thin. . It is for SURFACING (filling in voids) and is expected to have heavy film build and to be sanded.

 

Turn the Screw on the back of the gun untill the trigger has a full throw.. the one on the side , spray on a box untill the pattern is about 8-10 inches tall....I don't see a way to regulate the air pressure , you may nee to add a small one after the filter....

 

I am guessing one of these causes, thinner to fast for temps (duplicolor is lacquer primer I believe right?) not enough fluid. back the fluid **** off to allow more fluid flow, usually the bottom **** on back of gun on most guns, not sure on that one, maybe the one in back, at any rate when when you back the fluid **** out, you should feel the trigger get more travel, turn in, and trigger has less travel allowing less material flow. Spraying too fast, paint too thick, meaning gun is having trouble breaking up the material=atomizing it correctly, holding the gun too far from the surface, or not parallel with enough overlap of your previous stroke, or moving too fast, or lastly too high of pressure. Normally when I set up my gun, I will start with almost full fluid control, maybe in a turn or two in from where the trigger has most travel- from the point where the trigger will no longer have travel back when backing the **** off. Don't know if that makes sense, usually you can back the fluid **** off, past the point the trigger no longer moves. Hold your hand on the trigger back the **** off till you feel the trigger stop moving back, back in a turn or so once you feel the trigger travel moving back in. Spray the gun till you have the widest pattern without distortion. This site gives information on what to look for in a spray pattern.
http://www.stovebolt.com/techtips/hv...gun_basics.htm
You will probably have to adjust from there, but should get you started in the right direction. If getting runs, too much orange peel, then you would either move in your fluid **** some, or bump up the air pressure.
Lacquer thinner is usually used in lacquer primer. Its been a long time since I've used lacquer primer, Thinner should work fine, But you could technically use a enamel or urethane grade reducer in it which would be a better grade and believe slower evaporating. You can use a better grade solvent in something, but should never go lower grade, like using lacquer thinner in a urethane. At any rate a slower thinner or reducer is better then too fast of one. Besides slower allowing more time to apply and easier to get to lay flat,Too fast will actually cause the top to dry faster and not allow as much time for solvents underneath to escape trapping them. Depending on the tip size in that gun, it just may be a matter of reducing more so the gun has an easier time atomizing it. You didn't state what pressure you were using, but most hvlpls still require fairly high air pressure going into the gun like in the 40-50 lb range. I'd start by either trying to reduce the primer more, use a slower solvent or wait till cooler to spray, or maybe you need to change your settings, move closer, slow down, more fluid, and last on the list try less pressure. Probably not as likely problems being gravity feed and only doing one panel, but other things to watch for is that your vent hole in the cap is staying clear and isn't a bunch of dry overspray landing on the surface your painting on. Action is right, should really have a pressure regulator at the gun, or very least at the wall seperate from the compressor. Run full pressure from compressor, and regulate at the spray gun.