I had my basement waterproofed a while back. There was concrete dust on everything and it has taken a long time to clean most of it up. Unfortunately I left some shotgun shell hulls in an open bucket and they have concrete dust on them. I'd like suggestions as to how I can clean them, so they don't mess up my reloading dies. Will washing them in soapy water and rinsing them with clean water and let dry, do the job or will it screw up the hulls so they can't be used?