Sink Stains

Not a mainstream plumbing problem, but I've got Porcher sinks in my newly remodeled master bath and my "side" has a blue tint due to either my shaving cream (Edge gel) or my toothpaste (Colgate). I rinse the sink out after each use. Anyone seen this before? Any recommendations on removing the blue tint other than not buying Porcher sinks?

Tnx,
Rick

We get back toilet and sinks from customers because of marks they cannot remove.
We use this stuff called Gel-Gloss we get it at Home Depot, it works great and i haven't had a mark it wouldn't remove yet.

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