Sure, I don't plan on using any polish like that again, but it definitely did the trick for this. I was guaranteed it hadn't been used or had previously been returned. Maybe it was just one of those things. They do test them radomly, but they usually put the test paper in the packaging. It may be a return, a tad worrying as they didn't inspect well enough to notice the dirty cup. But as long as it works well and the original issue was resolved, any parts replaced etc, it's all good, Regarding polishing, now that it's clean, I wouldn't do that again if you don't need to. The chrome plating is fairly thin, and it does wear off over time anyway. It's only cosmetic and does not affect performance at all, so when it does wear it's no biggie, but polishing may make it wear quicker.
I love this brush, you made a great choice, time to enjoy!
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