Question about Northern Tool Vaper 2.0mm Hvlp Spray Gun with Stand 19120

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Vaper primer gun has intermittent air supply

I purchased vaper 4-piece triple gun kit. used it once and 1.4 primer gun spits. 1.7 finish gun works o.k..I returned kit for free replacement & new primer gun is good for 1 use only. I thoroughly cleaned primer gun but when I tried to use it I can see bubbles coming up thru paint cup, Indicating to me that air is escaping thru cup.Repeated cleaning does not help, so I try finish gun to check air supply & it works fine. Is there repair kit for something in trigger line concerning air supply?

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Does it come with instructions? The material thickness is VERY IMPORTANT when choozing the proper nozzle.

Posted on Feb 04, 2009

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Could be the new gun was supplied setup for spraying a high solids primer or something that needs something like a 0.7 mm fluid tip. Clearcoat would need a 0.4 mm tip, an appropriate needle and a different air cap.

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What causes fisheyes using an inexpensive HVLP system with Tremclad metal paint on aluminum?


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Fish Eyes: A surface depression or crater in the wet paint film. Fish eyes are caused by repulsion of the wet paint by a surface contaminant such as oil or silicone. The depression may or may not reveal the surface under the paint. Make sure the surface is clean.

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If you are going to be painting any aluminum, you are going to need an etching primer. This primer can also be used on steel. It is two-parts (not like epoxy, though) and tends to "bite aggressively" into the metal. It really stinks to have your paint stick well to your primer, but the primer releases from the metal. One of the major benefits is that you can paint over the primer in 1/2 hour, about the time it takes you to clean your gun and mix the paint.

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Masks Use a good quality dual cartridge mask for all work. Don't skimp, get the charcoal cartridges, they stop most aromatic vapors.

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