Not sure if this makes any sense but I'll post anyway. I moved into a place and the bathroom is ok however the porcelian at the bottom of the toilet bowl seems to have worn, at least I think it has. The reason I think it has is because it gets dirty very quickly and it's difficult to clean. If the porcelian was coated properly then I don't think this would be the case. Are there any products out there than one can DIY to recoat the bottom of the toilet bowl with a porcelian like...

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