Correct conditions for spraying aerosol lacquers

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Forum topic by keninblaine posted 01-18-2014 06:19 PM 876 views 1 time favorited 2 replies Add to Favorites Watch
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130 posts in 1629 days

01-18-2014 06:19 PM

Topic tags/keywords: lacquer humidity temperature

I’m finishing my desk project with satin lacquer, using Watco and Deft aerosols. Given that these products seem to dry fairly quickly, I’m wondering how important it is to worry about humidity etc. I’ve read articles that lacquer shouldn’t be sprayed if the dew point is within 20 degrees of room temperature.

My current weather here in the pacific northwest is damp (OK, it is nearly always damp here), and there is morning fog these days, with daytime temps in the mid to high 40’s. I try to keep my garage heated to around 60 degrees, but turn off the electric heater when spraying, and open doors and use a fan to move fumes out of the garage, so the garage temp drops to under 60 and the humidity is likely reasonably high. Do I need to worry about the damp cool air or does this type of lacquer perform OK anyway? So far, I haven’t noticed any adverse effects

-- Ken, Blaine Washington

2 replies so far

View a1Jim's profile


117126 posts in 3604 days

#1 posted 01-18-2014 06:49 PM

The easy way to check out if your going to have a problems is to spray a test piece and see what the results are.
I’ve never used spray Watco but the wipe on version needs a fair amount of time to dry.

-- wood crafting & woodworking classes

View GaryL's profile


1099 posts in 2857 days

#2 posted 01-18-2014 07:00 PM

If you start seeing a white blushing in the dried finish then you know the humidity was too high. If that happens, spray lacquer thinner on it to release the moisture trapped in the finish. That’s if you have a spray gun.

-- Gary; Marysville, MI...Involve your children in your projects as much as possible, the return is priceless.

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