Step 2: Finishing the outside of the bell
I also removed the paint at the top of the bottle, and ground off the numbers that had been stamped into the metal.
Using a cut-off wheel on the die grinder, I cut off the valve mount. I then returned with more Scotch Brite and smoothed it over.
For a final touch, I used a swirling pattern with the Scotch Brite to give it the pattern on the outside. People have told me that from a distance it looks dented at first, but it's actually very smooth to the touch. It has a nice, almost iridescent, look in sunlight.