[Alan Roehrich]

Joe, if the drum is anodized or surface heat treated, honing it may go right through either treatment, leaving not only the ring wear surface soft, but also the bushing surface. It might eat itself and take out some other parts.

You'd be better off to see if you could get a sleeve made. Bore it to fit the sleeve then hone the ID as required. You might find a thick wall piece of thick wall stainless tubing with the ID being a few thousandths small, and then bore the drum for a to allow a 0.005" press fit. Drill the tube for the passages, cut it to length, press it in (I'd warm the drum up), then hone it to size.