I took two old vanities that I replaced in the bathrooms and screwed them together end to end to make the carcass of a new garage workbench. They get raised 12" and I made a top from 2 x 4s glued-up face to face. I had to make the top in 2 pieces so they would fit through the 20" planer at work then glued the two together. I filled any imperfections with wood putty. I don't care what it looks like, I just want a good, solid surface. The bench is lagged to the wall. I also bored two lines of 3/4" holes front to back, two feet apart. The bench should be very functional for a lot of things but mostly it'll be my reloading station. And, I mounted a bunch of the old kitchen cabinets above it on the wall. I have five 8', 2-tube fixtures to go up on the ceiling and walls.
That's when I had a GREAT idea! I routed a half-round groove 3/4" wide x3/8" deep, all the way around the top, 3/4" in from the edge. Then I polyurethaned the shit out of the whole top. I'll bet that saves me from some of the trying to find parts that would otherwise roll off. Is this an original idea? Also I'll put some indoor/outdoor carpet on 1/3 of the bench.