White Splotches in Varnish

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Forum topic by Alan S posted 01-06-2012 06:30 AM 925 views 0 times favorited 1 reply Add to Favorites Watch
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Alan S

181 posts in 3339 days

01-06-2012 06:30 AM

I applied a coat of Arm R Seal to some mahogany on Sunday of this week. The pieces have set in my unheated garage and the temperature outside has been between 65 and 35 F. I believe on Wednesday, I noticed a white splotch in an area of the finish. I sanded down the whole piece with 220 grit sandpaper that day (white powder is what came off while sanding) and applied a 2nd coat. Today, I noticed more white splotches, probably where I applied the varnish a little bit thicker. What’s going on? I thought 3 days to dry would be enough even in this colder weather. Do I need to heat my garage? Help, Please!

BTW, on Saturday, I stained the mahogany with GF water-based dye stain. Was a day not long enough for the dye to dry?

Edit 2: Maybe what I am seeing is called blushing? At 11pm tonight, weather underground says the humidity here is 75%. I also read I might be able to get rid of it with a hair dryer by evaporating the trapped moisture causing the blushing. Thoughts?


1 reply so far

View Edziu's profile


151 posts in 3073 days

#1 posted 01-06-2012 08:22 AM

Hey there Alan. I believe you are experiencing are friction spots. Arm-R-Seal is a wipe-on product, no rubbing or buffing or pressure is needed. I used to work for a company that sold General Finishes products, and the factory Rep told me that 75% of the time, that’s what causes the white spots. Good luck.

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