A - Most solvent-based finishes rely on exposure to oxygen to cure the film. The situation you describe may occur when the finish is applied and allowed to penetrate between the board seams. Once it is in the seams of the floor, it becomes more difficult for oxygen to react with the driers in the finish. This allows the finish to remain partially cured for an indefinite period of time. As the floor takes on higher moisture content, the wood expands and squeezes any partially cured finish to the surface. It has the appearance of a bubble filled with fluid. These bubbles may break open and deposit a minute amount of finish onto the floor surface. This does not affect the performance of the finish but does make the floor less attractive. While still fresh, use Hillyard Kleen-Up Solvent to clean these areas. When applying solvent-based seals and finishes to a sports floor without air conditioning, it is best to apply as the humidity is beginning to drop, but right after very humid conditions. This will have allowed the floor to expand to its full capacity with minimal gaps between the boards.