applying polyurethane

Old 02-06-01, 08:18 AM
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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.
Old 02-08-01, 05:57 PM
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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.

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