| A |
Air, gas or vapor is entrapped in the pores of
open-grain wood (oak) and the finish dries before bubbles can dissipate. |
Apply a thin, wash coat of sealer (5 to 1
reduction) as a first coat. Bubbling is a difficult problem that seems to
be related to the quality of the wood used and its occurrence is very
spotty. A retarder (slower solvent) can also be used to slow the drying.
Bubbles can be caused by air leakage in a gun or a hose.
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