Thank you!
I have to admit the ring is quite uneaven in the edges, and the seam is too bumpy. But it is my first time, and it was difficult working with the thin and fragile material without ruining it completely.

Anyway! Here's an update. I've baked it (well, cooked it) and started the painting.

3 - testing the fit:


4 - adding the first layer of paint to fill the lines with dark colour: