I have finaly got the shop ready to move into, well minus the floor. What I am looking for is what should be used to seal the wood floors. They are 100 year old pine floors and are reallt dry. My first idea was to seal them with shellac followed by several coats of poly. If poly which brand. Other idea was to go with a oil or just shellac. Shellac is what was on there when built. The other problem is the main floor is 30' x 60', so cost is somewhat a issue.