My sister-in-law's church has a lot of old This End Up couches, chairs, and tables that need refinishing. She wants to set up outside and have volunteers come every week to work on 1-2 pieces at a time. She would like me to help her come up with a plan for this. I would love some suggestions. I would assume we would need an orbital sander and a palm sander to take off the old finish. What would be a good finish to do outside? It would be in a covered area. Would a mixture of Polyurethane, shellac, and linseed oil brushed on be a good way to go? Would it be worth doing a spray lacquer for durability?