Just got a new pair of Timberland Classic Nubuck boots. I bought them for an upcoming trip to Yellowstone National Park. The boots are already "waterproof" but I'd like to use a spray help protect them from satins and keep them looking decent. There are several products by Kiwi, Scotchgard, etc. anyone have any suggestions, or favorites, for protecting suede and Nubuck? Thanks in advance