AL are the easiest to clean. I use a piece of 1-1/2" copper tube with a cap on the bottom. Fill it with acetone. Insert the shafts. Walk away for an hour. Pull out the shafts and wipe them down. This takes off glue, nocks, paint, everything down to the original anodized color or pattern.
If you feel like you it you can dip and wipe to get them clean faster, but it's a lot more work and probably doesn't save time if you're doing 1/2 dozen or more.
The only issue I have ever had using this system is that I reused the dirty acetone a little too much. Like 6 months (3-400 shafts) It started to take a lot longer and also left a residue. But that definitely was na extreme case.