Hello! We have a brand new deck that we hired someone to seal for us. They used Penofin and applied so much that the wood looks wet (a week later!) and applied it when it was too hot so now we have black patches all over. We tried first to clean it with the Penofin cleaner and that didn’t work. Then we tested Behr stripper, and that took off the Penofin, but now the wood is dark, gray, and looks 20 yrs old! Any advice for how to remove the Penofin and get the deck back to it’s brand new beauty? Thanks!