As the others have said, make yourself some cone shaped bushes out of nylon or delrin, available off eBay, and use these in place of the metal bushes. When applying the ca I find it works best to use thin ca, and let a few drops drip in the blank while it's spinning and use paper towel (i use 3 sheets folded up and cut into strips) to work the ca quickly back and forth. It needs to be a quick operation for each coat using accelerator between coats. Don't be tempted to run the bottle of ca along the length of the blank to distribute the glue, just let a few drops in the middle while working it back and forth. This way I find, doesn't get too much glue over the ends of the barrel making it harder to remove. When I've built up the layers I use 800 by hand, not spinning, to smooth out any ridges then use plastic polishing compounds, Farecla works great, to get the shine then I remove from the lathe and use the 800 grit again to remove any residue glue from the ends. That's my method and I find it works well.
