Soak the sponge in a bowl of water that is room temperature.
Wring out the sponge until it is only slightly wet.
Rub the stain with the still slightly damp sponge, moving the sponge gradually outward toward the edge of the section of jacket where the stain is present. For example, if the stain is on a pocket, rub your sponge toward the end of the pocket seam. Continue this process until the entire pocket is damp.
Allow the jacket to air dry.
Inspect to see if the stain is still present. If so, continue to Step 6.
Cut the crust off a slice of moist white bread.
Roll the bread into a ball, and gently wipe the stain until it has vanished.
Treat your jacket with a leather conditioner to replace any oils that may have been removed when you cleaned it.