I agree Walter; where, on this issue alone should one stop, or even start? I have seen some advocate degreasing tubes, and then sanding them, some who insist wiping epoxy glue on the inside of the blank? how much further can you go? On balance all of these are a waste of time, the only satisfaction it is likely to give is that when it does go tits up and you end up with firewood you can reconcile your endeavours with the reassurance you could not have done more. And by the way, it's still firewood however good or bad you may feel.
