Fig. (16) AFM images collected at the three different scan sizes of the turned surface with and without HF treatment (TS and TS+HF), together with filtered MeX^® images after application of filter of sizes 20%, 10%, and 5% of the horizontal image width. The chemical treatment induces a topography consisting of small peaks which covers the surface. By application of filters, the turning tracks are erased and a very smooth surface is created for the turned surface (TS).