applying polyurethane
#1
02-06-01, 08:18 AM
How can I avoid those pesky little bubbles that appear when I brush on polyurethane?
I don't shake the can, I never drag the brush over the lip of the can and I always paint with the grain.
I don't shake the can, I never drag the brush over the lip of the can and I always paint with the grain.
#2
02-08-01, 05:57 PM
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Location: South Hill, Va. USA
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The main secret is the process called 'tipping the finish'. After you've applied the finish and spread it, make your final pass with the brush held about 5 degrees off vertical, letting the brush tip just barely touch the finish. This removes about 90% of the bubbles. The rest usually disappear during the remainder of the finishes 'open time'.
Over brushing is the biggest cause of bubbles in either polyurethane or standard varnish.
Over brushing is the biggest cause of bubbles in either polyurethane or standard varnish.
