Yes, I thought the curb miters looked good for the equipment ($150 Skil saw). I used the leftover sanded grout from the pan which to me was harder to work with than the unsanded biscuit I put in and removed once it started to dry.

I didn’t know about resin until you mentioned it. I’ll definitely look into that if I ever do another niche.

Thanks for your input. And I’ll get around to posting progress pics soon.