I'll try and take some pictures today. I used it on a coin I bought from e-bay that had a streak of dirt or something on it that I cleaned off and it left it really light. I soaked the coin awhile in some 3% peroxide to accelerate toning of the bright section and then rubbed some linseed oil (stand oil) in with a cotton swab. It appeared to cure in about a day.
Here are the pics. This is what I bought... And here is how it cleaned up and looks with the linseed oil...