Refinishing Garapa Deck
I built a garapa deck 3 years and stained it with TWP 100 series per John's reccomendation from reading this forum. It turned out great. Lasted for nearly a year. This spring I decided to start over again as the finish was pretty much gone and the deck had a lot of black spots from not being cleaned for 3 years. A combonation of dirt and grime and probably Mildew. I stripped it using the EFC-38 from Woodrich Brand. There are still several spots that are covered in black marks that I think are Mildew. The EFC-38 cleaned some of them but the really bad spots are still there. I reapplied the cleaner again and still pretty much the same thing. What should I do to remove these spots?