A make-up artist from MAC gave me these great tips:

1. rub a little bleach over the sandpaper before going over the edges seams and pockets to age them.

2. nailing the jeans. Making holes in the jeans by hammering nails through the jeans into a board.

3. crumble the jeans on the floor and spray a little bleach or dark blue spraypaint over it to create an uneven pattern