I have just added a new level to my home and will not be installing the flooring until next year. If I was to sand and seal the plywood floor now would that create problems in the future when I'm ready to install the flooring?
Any and all info. greatly appreciated. Thanks.
No, it would not hurt anything. Just be careful not to over-sand and cut through the first ply; the other plies are not near as nice.
I think you have a good idea!