Tell us about yourself!
Great tutorial! I also made this 3 years ago with about the same supplies. I used a low temp glue to seal the edges, but same principal as you noted here. Just a word on storing it after, mine disintegrated after being stored for 2 years. I was lacking shed space, so it was stored in a shaded area of my property inside containers, so protected from rain, but not heat and cold. It was a very cheap project, but time consuming, so not something I'd want to re-do every year!
Stop your glue gun leaking all over the bench