can water-based polyurethane be used for refinishing when the original finish was oil-based?
http://www.minwax.com/products/hardwood_floor_finishing/water_based_polyurethane_for_floors.cfm and… http://woodworking.about.com/od/finishing/p/polyurethane.htm And here’s an answer in reverse order (oil over water based): http://www.rd.com/familyhandyman/content/19644/ Another thing to take into consideration is that you should lightly sand with a fine grit, e.g. 160, fully cured polyurethane before applying a new coat of polyurethane. This will give the old polyurethane some “tooth” and clean up the old layer. Disclaimer: I have never done floors, only woodworking. Personally, I like working with oi
