Okay, I certainly don't want to dog you. I think it was a great start! And, with some additional work it will look just fine!

1) Colour. As just about everyone said, painted it will look better. I think you are better off with a black, than attempting a colour match.

2) It might be the pic resolution, but the cuts seem a little less than perfect (I saw some notching and waves in the cut). You might want to find/put a rubber or plastic track around the edges to hide the edge and give it an illusion of thickness. (Like at the top of fish-tanks or other glass applications where the glass edge is prominant)

But first, you might try some two-part epoxy. It does a great job smoothing out depressions and rough spots along edges. I use it all the time, with patience and practice you get smooth a sawblade into a flat tab that a 10X Mag-glass can't detect. It grabs metal well, and holds up great if mixed properly (mix for slowest drying and you get the longest life / strongest seal). I'd recommend (of course) practicing alot with the scraps first (drippage and running can really make matters worse).