Using the 4x4 Truss Bench plan (http://ana-white.com/2013/10/plans/4x4-truss-benches), we built this bench using entirely reclaimed lumber. (We had removed an old patio and part of a fence.) We already had all of the lumber, screws, etc. so the only cost to us for this project was the cost of the stain.
We modified the plan slightly, using 2x4s on the ends.
My husband is obsessed with decking screws. Thus the entire bench is held together with 2 1/2 inch decking screws. (Unfortunately, we purchased our Kreg Jig a day following the completion of this project.)
Because the lumber was very old and weathered, there is a lot of character to the wood. There were some incredibly soft spots which made sanding a challenge, and some of the boards were somewhat warped. However, we still really like the way it turned out.
I sanded (and sanded and sanded) using 60 grit, then 80... then 120... then 220. I filled the screw holes with wood filler (and sanded again). I then conditioned the wood with Minwax pre-stain wood conditioner. I used Minwax Early American oil based stain on the entire project. I then went over the top only with Minwax Weathered Oak. After about 36 hours of drying time, I used 2 coats of Minwax Fast-Drying clear semi-gloss polyurethane.
This bench is a beast! I'm sure it weighs over 75 pounds. It is extremely solid, and quite beautiful in our dining room. The plans were easy to follow, and the whole thing went together fairly quickly. (It would have been completed even more quickly had we had our Kreg Jig at the time. Lesson learned.)