Maybe 2 questions. Son and I built an outside movable bar, var top now needs to be replaced. Thinking of doing a river table top, but not sure how tgat would hold up.in the elements and mostly sun. Thoughts? Also, where are some good places to find the slabs to work with?

I have some mild steel letters that I plan to embed in epoxy resin in a bar cart top. The letters have a bit of surface rust on them and I'd like to keep that. I've been told that I need to seal the letters before including them in my pour. First, can I keep the surface rust and seal? And...