I'm sure most if not all people will say leave it alone; but Ive always been a little more aggressive with this than most. These signs are pretty tough but once the top glaze is gone the porcelain can get stained and not much you can do about it. If it bothers you, can try a light scouring pad, may clean up but possible you'll start to lose shine. In rough spots I've used 1000 grit and hit it with a buffer after. Have to be really careful as easy to lose shine, but it works. I did this years ago with this identical sign,

Last edited by Paul Bell; Wed May 02 2018 08:39 PM.

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