There are a few things that I did to resolve nicks when I was starting out. On was to make sure the angle is very very low and the other is vigilant skin stretching and holding. In the early days I do recall using more pressure with a dull blade and then too much pressure when it was freshly touched up. My experience with an over done edge is that it is too harsh, I often refer to them as prickly. Give it 50 on the fabric and 100 on the leather and try again.