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Old 30th Jul 2020, 5:05 pm   #12
Radio_Dave
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Join Date: Jun 2004
Location: Norwich, Norfolk, UK.
Posts: 2,543
Default Re: What causes this in polyurathane varnish?

I reckon the surface of the varnish has dried too quickly, shrinking as it dries, over the wet varnish underneath. It needs to be applied more thinly.

Regards
David
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