These doors were not for the faint of heart. We took it one surface and one detail at a time. Refinishing the exterior of this Acorn deck house has been a project we have been working on for over a year with there wonderful homeowners. The recommended sealer by the folks at Acorn Deck House is PPG Prolux Door and Window. Three coats are recommended for optimal protection. From the condition of the wood underneath the sealer we would say it does a great job!