I have had a bottle of .5 micron diamond spray from spd and decided to finally use it. It went to put it on my rough leather part of my modular strop, I did a few even sprays. The thing is I can't tel how much I actually put on because I can't see the difference like with the crox. I stopped before I knew I put to much on. Should I be seeing any kind of change in the way the leather looks?