A: With Nano Stainless sinks the colour is fused into the top surface section of Stainless Steel becoming part of the stainless steel, not a coating. While very hardy and durable, it is normal for stainless steel to be scratched from every day crockery and utensil use. Scratches, scuffs and marks will show in silver grey colour of stainless. Harder objects with a rough hard bottom base, such as porcelain and crockery are more likely to mark the surfaces. Roll mats or dish mats used in the bottom of the bowl and drainer may help reduce the amount of scratching from daily use.