SL Shocker:
Waaaaay back in the day I came up with an "SL Shocker" design which was designed to remove the most amount of unused metal from the body as possible. Eventually a spare body came into my possession so I bought some new tools and set to work removing metal from it as described in my rednering. The end results looked like this:
Parts of the milling operations used on this body can be replicated on other bodies, to lesser extents. For instance you don't have to go all the way through the back section of the body, instead just create a hole to expose the internals. This would look very nice with a "swapped parts" anodizing scheme.
There is an amount of additional material that I'd like to remove however I don't have the effort on the project at this point so I don't plan on continuing the milling.
Milling Patterns:
A few other people have milled Shockers on their own, and of course you could get any respectible machinest (paintball or otherwise) to do whatever you wanted within reason. Here are a few examples of other milled Shockers I've seen.
The first and last pictures were milled by EPM.