[Stealth]

I think what he means is that it's a cleaner wax - these types of waxes contain an abrasive which basically polish out the barrel.
Essentially you're bore-lapping the barrel - extreme care should be done when doing this as any sort of twisting motion will impart undesired cuts in the barrel - leading to spin deviations. Also, this should ONLY be done on a stainless, or brass uncoated barrel as this process will begin to remove any sort of coating the barrel had on the inside.
A good barrel should be relatively maintenance-free, I typically just use a piece of lint-free cloth attached to my cleaning rod and pass it through a few times after 3-4 games of action.

Prometheus barrels are SUPPOSED to have better bore consistency than others, but without a good bore consistency gauge, nobody knows for sure. Maybe we're all just paying for the name. I might get an Angry gun barrel and test it out, but differences in batch-to-batch tolerances would actually mean that I would have to have a large enough pool to conclusively say that Angry Gun is comparable to Prometheus.

I've had pretty good success with Madbull barrels but they have a limited lifetime as I've seen the accuracy decrease after prolonged use due to the coating wearing out over time. For the price they're pretty good.