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Old 12-22-2013, 07:49 PM
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If you still have the bumps then I would suggest that you skip the rinsing with water. The varnish dust that is left after sanding will blend right back into wet varnish anyway - it doesn't have to be removed. If I was doing it I would blow off with air and lightly wipe with a lint free cloth or a tack cloth but not use any water. If you were to look at your 8 coats of varnish under a microscope you would see a surface that looks like a sponge. Even though the holes are very small they are enough to hold minute amounts of the water you are using to wipe the dust. They won't dry easily so I think the bumps you are getting is from them gassing and causing the next coat of varnish to bump up.
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