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Great Job!!!! Weather proofing it shouldn't be too hard. You can use Krylon or Rustoleum paint. I've used Rustoleum primers and then covered that up with Plasti-Dip on past projects. The Plasti-Dip does a good job at offering a "soft" covering to protect other surfaces. Also, you can get truck "bed liner" coatings in small spray cans (sold for repairs and touch-up) at auto parts stores. This stuff is tough and indestructable, but not that attractive.
Powerful Slingshot Crossbow
Woodturning with a drill press
Folding coffee table
Make a Router lift out of recycled closet door rails.
Elasto-O-Matic RBG-5 - Binder Launcher
Sleek Picnic Table with Detached Benches
Bench Lathe 3 in 1 (Lathe - Sander - Grinder/Sharpener)