I have a good quality strap. Problem is, it is just too bland as well as being wrong colour for the watch head it came paired with. In my research, I have read that to distress leather you will first want to spray Isopropanol alcohol on the piece. Then rub with fine sandpaper and finish with boot polish, to protect the finished strap.
As a watch strap is more supple than say, a trouser belt, I want to know what others have tried. Perhaps using a smooth stone in place of sand paper.
I want to go from this:
...to some nice creases and fading like this: