I built a mahogany deck and waited 2 weeks for it to dry out. The local sales person recomended I use cuprinol clear wood finish. I put on 2 coats and about 1 month later the finish started to wear and peel in spots all over. It now looks like my 1yr. old deck is about 10yrs old. Any one know what happened or is this stuff lousey. How can I fix it?