Midway has a waterbase shell lube that can be used wet or dry and will not damage the primer or powder if you accidently touch them. When you are done, just wipe them clean.
If any of you tumble polish you shells, you can alway polish your completed round to make them look spiffy and clean.
I usually tumble clean all my brass before relaoding them. Nice shinny brass relaod easier, uses less lube and you can easily check for damaged or deformed cases. During inspection, you can check case length, etc...