It might have been here where you saw @deirdrebeth’s link;
She talked about using thin CA and linked to a video where a guy showed just how to use it. I’m expecting some from Amazon today and am excited to give it a try.
Thanks for the tips on engraving small stuff…it can be a PITA for sure. I like that idea of using rice to stabilize small things. I made several small holders shown in my photos. The rings fit into them very snugly, so I can work on them easily with both hands.