Spraying primer with HVLP gun, What am I doing wrong? |
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Spraying primer with HVLP gun, What am I doing wrong? |
bondo |
Apr 18 2005, 07:57 PM
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#1
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
Ok, I tried out my new HVLP gun. I was spraying high fill primer. The output was similar to what you get from an airless sprayer for house paint. It literally looks like an orange.
Here are a few things that could be contributing factors: 1. Never used a HVLP gun before 2. 3 year old primer that says "use within 6 months" 3. Cheap Harbor Freight spray gun (no instructions besides an exploded diagram) The primer had settled out and needed serious stirring. I did get it mixed, but it seemed thick. It said thinning wasn't necessary, but after I thinned it a little it worked better, but it still wasn't "flowing out". I didn't want to overdo it and get runs. This is the gun I have HF HVLP I did like how I could spray outdoors in the wind without mega-overspray problems. |
skline |
Apr 18 2005, 08:10 PM
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#2
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Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
50 to 70 pounds isnt really an HVLP, I just picked up an HVLP that only requires about 14 to 26 pounds. It also was less money and has changeable tips. For Primer, I would use a 1.8 tip, for color coat I would use a 1.3 to 1.4 tip. Primer when it gets old gets really hard to shoot. Most of your problem is the fact the primer is old. It will setup even without a catalyst. Once it is opened, it must be used pretty soon or it will start to harden.
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