Jeweling metals, need info

[rendoman]

Hi all!
I tried engine turning - jeweling, that's the front panel of my Esl headphone project. Not a perfect job, but good as first real attempt, not with small test plate.
Unluckily leather pad glued to wooden rod disappeared, the wood did a nice job. Due to little experience in jeweling with the lack of a good tool, the circles are not all equal, plus I made some errors, it's hard to see the pattern under the emery paste without cleaning. Another difficult point is the square and large shape, it's easier to see errors, above all with more than 1K circles.
I will trim and polish the edges, as scheduled.