u/SSG__1

Building a coffee table from 4mm H111 aluminium (1200x60x38). I have the pieces bent and ready, but I’m struggling with two things:

1. How to join the two sections together using countersunk screws so it looks clean/flush.
2. I don't have an AC TIG welder, so welding is out of the question. I need to reinforce it from the inside without the bracing being visible from the side.
3. Is my best bet some internal angle iron and epoxy? Or maybe rivet nuts? If you’ve built metal furniture without welding, I’d love to hear how you tackled the structural support. Thanks!

Edit: I usually dont work with aluminium so i dont know much about it.

Got this board and boots second hand for a good price. is it good for a beginner and how do i service it before the season starts?