This is a great video showing the process, I tend to go much slower and soak my coins for much longer and clean them over many sessions but the process is basically the same. He did a great job stopping at the right time, without a better microscope and other tools that was about as clean it was going to get without making mistakes.
I think he should have used a fiberglass pen before applying the wax, then the final result would’ve looked much smoother.
Also the edges look concerning to me, might have some bronze disease. A long term soak in DW can clear up mild cases of BD