A feather duster works, too......
I painted a whole Jeep for a guy once.....used Krylon Tan for the base, Brown on a sponge for the bigger spots, then used Black on a feather duster as the last step. The feather duster will lay down a different "pattern" every time you smack the object with it. You could back off a few feet from the Jeep & it looked just like MossyOak Bottomland.