Don't prime them and chuck into a tumbler with plain media for a few hours. Knock out the media from the primer flash holes and job done.
I use a Lee trimmer rig to do the flash hole at the same time as trim and check.
You can wash the case lube off for most brands but then you've got to dry them.
Thanks guys for the replys, at the moment I chuck the re sized unprimed cases back in the tumbler for 30 min but I've just purchased a turret press and want to make use of the primeing tool on it
How do people clean them on full progressive presses