[Tom Goldman]

Anodizing can be done in any color ,including clear.
there are different processes that can enhance hardness,but bottom line is that it's still aluminum.
Alan's recomendation to install a thinwall sleeve is probably the best route....Ive done this to save a few PG drums over the years.
The reason the rings wear on the lands us usually due to the soft cast iron type ring ,and boosted line pressure.....Years ago when we were running a ClutchTurbo in a B/Altered we had to go to the teflon rings due to wear on the center support caused by the higher pressure we were running. ....Now ,years later ,I've been using nothing but the hard chromed rings in TH 400's ,and have not had a failure in years.
Every builder out there has their favorite combination. ...My preference ,especially on lower pressure S/SS type trans are the chrome rings. ...