Most of the decks I do are Cedar, and are coated with some cheap consumer grade junk (Behr, Thompson's, CWF, etc.) This usaually means stripping and some furring. I remove any and all fur on the deck floor with the Makita (easy). The spindles are a PITA, but for them I use a 5" Porter Cable random orbital sander. This works pretty good. Old unprotected decks or fences will definitely fur on you because of the large amount of dead wood fibers. I usually plan on around 5 hours of defurring & detail work on each job. If it's less, then its more $ in my pocket. If you have a helper, have them do the spindles. Oh yeah, I no longer defur fences because of the advice from some seasoned pro's on this board.