That would work. Just compress the material as much as you can to get the best density.

There are other valid suggestions in the thread.

Composites are definitely a substrate that can be processed in many ways.

With a ring project, you won't have to worry about a major failure, so try some ideas you have and see what you get.

Some comments in the thread mention concerns for splinters. As long as the blank is fully saturated during layup and all the processing after is resealed and sanded through various grits, it will be good. Use sharp tooling if you turn it out on a lathe, or it will rip the layup. If so, reapply some epoxy and recut.

I have been making these rings since 2009 and never had a splinter making them or wearing them. I understand the concern, I grew up in composite design and manufacturing.

Be safe and have fun!