I don't want to beat on a dead horse or anything, but I feel like I should explain. The pot is aluminum, with a cheap spigot on the bottom, and the internal texture of the pot is rough, almost like cast iron. I scrubbed it with a copper scrubbie thing, and all I get is dark gross stuff that I don't know is actual dirt or a chemical reaction. Either way I don't want my beer touching it. I tried putting my 5 gallon pot in there but the handles prevent it from touching the surface by about three inches because they rest on the safety rail things. I think they might have to go. Anyway, if anyone has feedback I'd like to hear it.
The black stuff you scrubbed off is probably aluminum oxide and you'll need to boil that kettle full of water to recreate the coating that you just scrubbed off to prevent your beer from tasting metallic. I think that I would have liked that pot better than the 30 qt one that I have as with the straight sides and lesser capacity of mine I have to watch more closely to avoid boiling it over. Before you complain about that kettle, make a couple of batches and then come back with any comments. I think you will like it.