Is that Outdoor Spar Uerathane? Don't use auto clear on it. Looks great!!!!! If so wet sand it with 1200 to get slick then with 2000 grit, clean it then buff it. I used McGuires polish #1 cut and got great results after the buffing, wax it with some really good wax and buff it again then apply it by hand and just wipe it off. If you need help let me know!!!