Reply by John_

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Posted on Strange behavior in finish when HVLP spraying

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251 posts in 2998 days

#1 posted 12-09-2019 07:38 AM

HVLP spray gun is usually set to 30 psi. You really need to test spray a cardboard box or some construction paper, for example, to see how the pattern is looking. Here are some examples:

I always thought that the whole idea of using oil based paint is it takes longer to dry which allows it to level out (aboid brush marks, etc) It is clearly not happening.

I would strongly suggest you switch to a different product. Again, Benjamin Moore advance is a lot thinner and easier to spray, but their is a disadvantage in that it has a 24 hour recoat time and may take several weeks to fully cure. Another option that I have had excellent results is General Finishes makes a ‘pigmented’ poly. It comes in either black or white in 3 different sheens (satin, semi and gloss) It really is easy to work with, sands fairly easy and can be recoated in a couple of hours.

Lastly, my big ‘breakthrough’ in spraying wood finishes came when I finally moved up to a pressure pot type of gun. Being able to force the fluid to the gun made all the difference in the world. I have actually heard good things about the Harbor Freight guns – here is an example (I have a C.A. Technologies gun and pot that I have been very pleased with)

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