It's amazing how many characters in comics wear leather, isn't it? This is my method for coloring shiny leather jackets, boots, and pants. As always, personalize this method to suit your tastes and the way you work. And the best thing that you can do is look at lots of reference photos!
This technique will work well for shiny leather, pleather, vinyl, and rubber. For more matte-looking leather, you may want to make the highlights less pronounced.
The following recipe will walk us through creating a pair of shiny leather pants: