I too have used brass brushes,you don't want a firm BRUSH,there is various thinness&firmness to brass brushs...you want a thinner brass wire brush&brush softly,as mentioned w/dremel tool,etc....HH ALL!!!curbdiggercarl57 said:I've used a brass, (yes brass) brush with some good results. Buy them at any hardware store. Just make sure that you lightly, and I mean lightly brush them. Like you are brushing your teeth. I usually clean the tokens this way, under running water. Good luck.