How to make your denim look like shit

So, I was lucky enough to source out some overalls that fit the singer and were appropriate for the 1930s, but they were all bright and shiny, and the character was a poor, unwashed Midwest Dustbowl farmer. Out with the power tools! A few hours strategically power sanding and wire-brushing, and the denim, although not faded, did appear a bit more broken in.
Also, I got to have fun with tea-staining garments, for that sepia tone effect.