maybe you could get it flame sprayed, I'm not sure how much it would cost, we do it a lot at work, but at work the government is paying for it, so I try to make sure we get the maximum life out of our equipment, (I pay taxes too.) We also have a ceramic coating put on certain shafts where the seal rides. It really makes for a nice finish, I wouldn't use the JB weld for the actual seal surface, I was only mentioning that the speedi-sleeve instructions recommend building up the area to be protected in much the same manner as you have done, prior to installing the sleeve.
