Looks like you'll have at least a few more days worth of work on it (assuming a couple/few hours a day) before it gets nice...
It took me about 8 hours to polish up my first keg to where I was ok with it. I spent a bit less on the second, getting a better shine on it (started with a better keg, and used less abrasive pads on it, more buffing though). I expect the next one to be a bit easier, depending on the base keg condition.
BTW, beauty may only be skin deep, but ugly goes clear to the bone... If you start with a really rough keg, unless you put a LOT of work into it, at some point you'll call it enough. Even if it's not where you would like it to be.
One thing I will mention to anyone looking to polish up a keg. Don't cut, or drill, it at all until you're done. It will make it much easier to both polish/buff and you'll have less to cleanup later (inside the holes where buffing compound will stick). I had my first keg already cut and drilled before I started polishing it. Second one didn't have any extra holes/cuts in it until I was finished polishing it up.