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How do you get scratches out of a white ceramic sink? 

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The plastic scratches and micro-particles can be removed, while the brittle scratches can be passivated, so that surface defects can be reduced and surface quality improved.
It provides a method to detect localized corrosion arising from scratches.
It is shown that scratches initiate failure of the protective oxide.
Large particles were observed in the grooves formed by the traditional scratch method, whereas small chips of SiC were found in the scratches formed by UVAS, which indicated that the material removal ratio was higher for the scratches formed by UVAS than that of scratches formed by the traditional method.
Journal ArticleDOI
C.P. Doǧan, J.A. Hawk 
01 Oct 2001-Wear
51 Citations
Nonetheless, characteristics of the ceramic microstructure do influence its hardness and fracture toughness and must, therefore, play an active role in determining how a ceramic will respond to the specific stress states imposed upon it by the wear environment.
Large particles would play a significant role in increasing the number of scratches.
Therefore, when making a restoration using a leucite-based heat-pressed ceramic crown, it is advisable to use tooth-coloured materials such as a porcelain veneered cast post, if you will not be able to make the ceramic more than 1.6 mm thick.

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