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I am making a mirror frame in steamed European Beech that will be situated in a bathroon that is prone to condensation. I considered using AC lacquer but discarded this idea due the moisture in the air. I am now considering Danish or tung oil. Does anyone have experience of finishing timber this will be situated in an area prone to condensation? I look forward to your responses. Martin
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Stay away from the tung oil, even with lots of coats it has poor resistance to water or vapor. Danish oils are usually just thinned down alkyd varnish, sometimes with a little extra oil and some color. For a good standard level of protection you can use an interior alkyd or urethane varnish. Better protection will come from an exterior rated varnish or spar varnish. Best available is the nasty stuff, catalyzed (or linear) urethanes. These are available at auto or marine paint stores. The interior products and the catalyzed coatings can be rubbed and polished if desired. The exterior varnishes do not usually polish up as well.
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