Capacitive Tablet Repair

Looking at the cross-section of a capacitive tablet, the working principle is that of an interposed conductor in the middle between two plates acting more-or-less like a standard capacitor.

If the tablet is scratched and the aesthetic inconvenience aside, one of the possible problems is that a stylus might end up bumping onto the edges of the crevice of the scratch, which will perturb the drawing process. Nevertheless, compared to a capacitive touch-phone, the difference is that the top panel must not be transparent and even if it were made out of glass, there is nothing underneath the panel to be seen. The tablet is easy to repair by simply using some sandpaper to eliminate the scratches. Ideally, one would use a hard-grit sandpaper to etch out the deepest of scratches and then a soft-grid sandpaper to make the surface smooth.