Shell cordovan, particularly when it is new, has a "feature" whereby it will sometimes develop a hazy white buildup (presumably remnants from the tanning process). Normally, this isn't really a problem -- just buff it off with a rag. But what do you do if it develops along a gimped seam or interspersed among the stitching on the upper? A rag doesn't allow fine enough work to get it all up. Must I resort to a Q-Tip?