you're talking about brazing over the entire surface of the metal, right? Although it's probably possible, you're likely going to find that it'll be highly time consuming and expensive for acetylene. You might venture over to
www.caswellplating.com/bbs (Caswell's Forum) and see who is selling their plating services. That'll likely be an inexpensive way to get stuff electroplated, and I've seen some really great work out of those guys.