Q: I am using Lawrence McFadden’s wipe on polyurethane gel but my furniture often winds up in sunny locations. Is there any UV inhibitor that can be added to this gel or should I try rubbing on an exterior poly or marine varnish that has an inhibitor?
A: The short answer is that it would be a whole lot easier to simply use an exterior varnish as your wipe on finish. While there are UV blockers and absorbers you could theoretically add to an interior one, they are not easily available. They are usually only sold to formulators, in part because their use requires a good bit of formulating information. The amount to be added is typically controlled by the resin weight, something few people outside the person who formulated the mix are likely to know.
Michael Dresdner
straight talk about wood finishing
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