Most door companies apply a paint or poly finish before delivery, or you can save a few bucks by ordering the door unfinished and coating it yourself. Just be sure to seal all edges so that the wood doesn't wick up moisture.
Polyurethane No other clear finish matches its durability and moisture resistance. Apply
two coats of exterior-grade polyurethane to start. Sand and apply one fresh coat every two years to keep it looking fresh.
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