Had some persistent rust in a pot that Barkeeeper's Friend was not dealing with effectively. Ended up grinding off the rust. Now rust is gone and pot is passivated with BKF. May be a dumb question as I think it is fine.... Anyway, question is does grinding it down have any ill health effects? It is stainless and I suspect I just messed up the cosmetics of it more that anything, but nothing bad is getting in my beer as far as I know, right? Just looking for a bit of reassurance.