last summer i completely demo-ed and rebuilt a wrap-around wood porch in centr mich lake house with clear douglas fir timbers, railings, facia & flooring. i wanted to keep the natural beauty of the wood and sealed everything with only linseed oil. as the porch is open, the floor has a couple spots that weathered. what should i do (and products to use) now to clean and finish touch-up or re-finish completely?