Entry doors that have been hanging a while have a tendency to be very dried out. Refinishing old doors takes a bit of care, the moisture content on the inside can be higher and dry wrotting can possibly be an issue. Take care to make sure that the wood is truly sealed on every possible edge, to prevent warping.
CHRIS, Charlottetown PEI Canada. Anytime you can repurpose, reuse, or recycle, everyone wins!