mountainview,
Heck, there's nothing to cleaning these up so here goes.......Just take a little fine steel wool and/or some SOS pads and go to town under the warm water faucet! Rinse them well, allow them to dry on a towel thoroughly before reloading. Now, if you have a tumbler, use some corn husk media or walnut shell media and a little liquid cleaner and zapp....they're just like new! Be sure to inspect each one to make certain the necks are not split, or corrosion has not weakened the necks.
Now, one last thing, remember to check dimensions of the cases after you resize them to make sure overall length and neck OD are OK.
Jim