Start up Greasy Bean Undercling (5.9+) and work your way up the route on the left side of the chimney to the anchors. Clip a quickdraw (preferably a long sling) to one of the anchor bolts, and then traverse to a bolt on the side of the chimney. From there traverse to the 3rd bolt of Voodoo Child (5.11a) and top out to the anchors of Voodoo Child. Use long slings on the traverse to minimize rope drag.
Shared Start with Greasy Bean Undercling