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Spraying water based finish problems (Help)

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Forum topic by simpsy posted 624 days ago 747 views 0 times favorited 5 replies Add to Favorites Watch
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simpsy

28 posts in 934 days


624 days ago

Topic tags/keywords: walnut maple finishing spray gun

Hi everyone I have just started to finish up my walnut and maple serving tray that I have been working on for a while. To practice my finishing techniques I took my finish of choice (General Finishes Exterior 450 outdoor varnish) and used my critter sprayer and began to practice on a scrap piece of lumber. The finish is nice and smooth after 4 coats, but the only thing that is kind of annoying me is you can see the finish is almost specked in appearance, it is not an even sheen as I would like. I would not be totally upset if this finish was on my serving tray but I would rather it be an even sheen with no speckles. If anyone has any tips on spraying the finish or maybe tips for after spraying it to fix this problem I would really appreciate it.

thanks Greg


5 replies so far

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pintodeluxe

3034 posts in 1318 days


#1 posted 624 days ago

Can you elaborate on the sprayer? I have not heard of a critter sprayer.
If my gun is clean, and will spray thinner well, but is having trouble spraying thye finish—- then the finish likely needs to be thinned 10%. Otherwise, changing tip and nozzle sets on HVLP sprayers can help.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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simpsy

28 posts in 934 days


#2 posted 624 days ago

View NiteWalker's profile

NiteWalker

2329 posts in 1082 days


#3 posted 624 days ago

Try lowering the pressure at the compressor.

I have a critter gun too and the key is to set it at the lowest pressure that gets the job done.

I got decent results with the critter, but wasted a lot of finish because of overspray.
What I ended up doing was splurging on a QS-125WB with bigger cup from homestead finishing. It’s an hvlp conversion gun and is lightyears ahead of the critter.

-- He who dies with the most tools... dies with the emptiest wallet.

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pintodeluxe

3034 posts in 1318 days


#4 posted 624 days ago

After seeing the gun, I would recommend the Woodriver (Woodcraft) Gravity-Feed HVLP gun. The gun sprays an excellent finish and amazingly costs less than $40.
Porter Cable offers a nearly identical gun with a regulator for a little more money.
See my reviews if interested.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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simpsy

28 posts in 934 days


#5 posted 624 days ago

Thanks for the advice everyone. As for my problem, I toned the psi down and layed a little heavier coats. Looks great! THANKS AGAIN

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