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BF...does it say on the back of the can...interior,exterior an marine use? if not take it back to the store an get your $ back...poly as awhole is grade down from straight urethane.Poly is something they cooked up for homeowner projects because it dries faster. There's a big differents between polyurethane an just plain urethane...I've been using the crap for over 37 years.
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