I completed this table with my 5 year old daughter as my assistant. My husband requested a table to put next to our new hot tub to set his drinks on and this is perfect. We only put one board on the top because I felt since it would be outside, I wanted a smooth top. I just screwed it in diagonally from the bottom. I also used spar varnish since it would be outside.
Semi-gloss Spar Varnish (3 coats)