Wow! Did this go to hell in a hand basket in a nanosecond. Cleaning is not restoration, just a potential step in that direction. Restoration involves treatment to restore the physical, structural integrity of the pipe. Making it pretty is cleaning.
Which is why, when I first posted this pipe:
Before:
and after:
I specifically said I cleaned it up and did not consider this a restoration.
I had a decade of doing restoration of fine and occasionally vintage (think 18th century - try matching centuries old alloy content and processing) antique jewelry. Only part of that process was cosmetic. The actual restoration involved fabrication of elements made of precious metals that needed to blend with the original, without damaging the original, and which matched the various melting points of that antique metal, such that that 21.5 karat solid gold chain mail clutch purse didn't dissolve into a pool of gold.
As far as a restorer who I would entrust any of my pipes for the best possible result, it's georged.