Cleaned Or Restored?

I would have only given that coin a good application of Verdi-Care and called it a day . You just Detailed that coin by what you did .

I like the way it looks but stop at this point. Sometimes people go more better too much.

Voted Stop there, but would also say No Tooth Brush.
Sometimes you may win and others you may lose. I don't think there is any cut and dried formula, as each coin you try this on will give different results.
Haste will make waste, that's for sure. I have had some success conserving circulated tokens & medals which might be slightly less of a sin than cleaning US coins. I certainly would stick to common coins if you're going to do this.
A toothbrush is just going to retain some debris and scratch the surface as it drags the dirt across the coin.
A soaked soft toothpick tip and patience is probably the better way to go or coops "green" thorn is probably much better.

Toothbrush?

Thank you all for your input. I will be ordering the Verdi-Care. The experiment will continues in a new thread.