I've posted these pics on SCORRS, and thought they might also be appropriate here. I started with a pair of Uberti New Model Armies with that butt-ugly Millennium finish. I dissassembled them, then degreased thoroughly with brake cleaner. I removed the finish by soaking them in white vinegar and wiping off with a series of paper towels. By the way, I discovered that part of the Millennium finishing process involved bead-blasting the metal. Next came a thorough soaking in a baking-soda/water solution, and an even more thorough rinsing under running tap water.
The
moment they hit the air, they started oxidizing, so I rubbed them down really well with lots of oil. I thoroughly swabbed out and oiled the bores too.
Next came the fun part -- using and shooting them in matches and, with reasonable care, letting them age on their own. Several times I've been asked if they're originals, which pleases me greatly.
Here's how they looked shortly after I finished them, but before installing "aged ivory" grips and the "antique finish" R&D conversion cylinders. Note that I did not strip the finish from the percussion cylinders:

Here's how they looked with the new grips/cylinders and a few months of handling and use:

And here's how they look today, after better than a year of handling and use:
