Solid hardwood floor installed then refinished in Houston

We installed this solid this solid maple flooring  nailed down to existing plywood. Layed on a sound proof membrane to reduce sound and minimize moisture penetration from below. Allowed this floor to acclimate one full week before installation in home with temperature at 73 degrees. After installation we then sanded and refinished this floor making the wood flat, sanding with 3 different grades of sand  paper, 36 grit, 50 grit, 100 grit, filling wood floor voids and areas that had cracks, nail holes. After showing customer samples that we had placed on wood floors we then conditioned the flooring allowed to dry then applied 1 coat of dark walnut stain by Dura Seal then finished it out with 2 coats of Masterline oil base polyurethane finish and shoe molding.