This is how I distress my mantle and it's so easy! How to "distress" painted wood furniture. The technique she uses is a little different than what I've done. Looks easier.with a little less dramatic of an effect.
Video Tutorial for using Vaseline to Distress furniture. (And it's really easy!)- use a paint brush to put the Vaseline where you want the distressing (edges). Paint with any type of paint. After dry, wipe edges with cloth to get distressed look!
Make NEW wood look like OLD distressed Barn Boards