How to remove stains from a porcelain Dutch oven

Can porcelain be permanently colored? Does porcelain yellow? Porcelain crowns can yellow due to several factors: The crowns are not real porcelain – Intact porcelain crowns will not discolor or yellow. Damage to the glazing of your crowns – If the glazing of your crowns breaks, they may become discolored. Can porcelain teeth become discolored?…