I was planning on purchasing toilets with the CEFIONTECT finish from Toto. However, at one toilet store, the sales woman recommended against it strongly as she said she had found the toilet stained more easily with CEFIONTECT. Does anyone have personal experience with the CEFIONTECT? If it is cleaned with something that scratches it, like Comet, and the CEFIONTECT surface is penetrated, could that lead to worse stain problems than just the regular porcelain finish? Any insights welcomed.