Making Gin's Shoes "Dirty"

Want in on my trick to make brand new shoes appear dirty, without using actual dirt?

Here's what I did for Gin Chance's shoes for "Trestle at Pope Lick Creek" - I took a black pastel stick, rubbed it on a paper towel, and then took the towel and rubbed it onto the shoes.

Since in the show Dalton takes his mom's shoes off, I needed to make sure the pastel wouldn't come off onto their hands during the show. My solution was to spray my art fixatif on the shoes. And it worked! 

So far we're two weekends in and the shoes are looking great. I had purchased the shoes so I am able to do whatever needed to them for the show. I know you could pull this off with several different methods, but I really enjoy my pastel stick trick.