Ranger, I'm not familiar with either of the two that you've mentioned, I've used whatever Hopps or Birchwood Casey had on the shelves at the time. My problem with "touch-up" was the blueing never matched, so I always ended up blueing the entire piece. I've always been pleased with the results. Most of the time, I had done a little polishing before bluing and the results were better than original. The "tips" that I learned were, metal must be clean, and if it is "water heater hot" temperature, it seems to work best.
Since you're doing the entire cylinder, I think you'll be pleased with the results.