Specifications include, but are not limited to: Complete sand down and refinish of two gym floors. Main Gym: 15,351 SF (119’x129’) Aux. Gym: 7,821 SF (99’x79’) A. Sanding 1. Sand flooring with drum sander, edger, buffer and hand scraper. a. Use coarse, medium and fine grade sandpaper. b. After sanding with drum sander, buff entire floor using 100 grit screen back or equal grit sandpaper, with a heavy-duty buffing machine. c. Vacuum or tack floor before first coat of finish. d. Floor shall present a smooth surface without drum stop marks, gouges, streaks or shiners. B. Finishing 1. Apply two coats of sealer and minimum two coats of finish. a. Screen back or steel wool and vacuum or tack between each coat after it dries. b. If after final coat of finish if the surface does not have an even uniform appearance floor contractor will apply as additional coat of finish at no cost.