i just bought a house that ive been renting for a yr in a half. it was remodeled before rented. new beautiful oak cabinets were installed in the kitchen when they did the remodeling. they look to be stained a light teak color, looks nice. they dont have that "poly" look at all. i was thinking of putting a coat of poly on them to protect the finish, now that i own the house i can! would this be a good idea? also, should i brush a coat on one door first, just to see how it looks, before i sand all the cabinets? because, if they never were treated with poly, i shouldnt need to sand them, correct?