The 205/206 is pretty impressive. I can guess at some of what would have to be done, but I won't. My earlier post was probably close enough.
And yes, it's pretty scary what a real restoration expert in any field can accomplish. There was an antique restoration place in Arlington Ma for a while that had some antiques in the window along with before pictures. How a vase went from a pile of shards and dust to looking like new was amazing.
The price was also amazing, but apparently the vase was worth it even restored. I think they marked the stuff as restored to avoid problems.
Any time the money gets above what the top quality fakery costs the fakes will be made. In any field.
The next step will be collecting the best ones. In stamps, there are some forgeries that sell for more than the real stamp.
http://www.glenstephens.com/snapril04.html
Steve B