ok so I think it's time to chime in. We use something called B-67. Its base is Naptha not acetone. It comes in a small bottle that has a nailpolish-type brush and you don't need to use alot of it. It's great on metal (acetone can erode metal over time) and can be used on the same things as B-72. The only issue....it doesn't come in white. We use ink when we need white numbers.

Rosie DiVernieri

The Chemical Heritage Foundation

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