I am in the UK but I understand that you guys can rate your doctors? That being the case, what sort of reviews does this doctor have, how many times have they done this procedure on people with scleroderma and how successful was it? Infection rates?
The Royal Free London, a scleroderma centre of excellence, does a similar procedure for people with microstomia to give them back a mouth. They take the tissue/fat or whatever it is from a scleroderma free part of the body, check that the fat/tissue really is scleroderma free, then inject it or however they transfer it to the affected body part. The reason they check the tissue/fat to make sure it's free of scleroderma first is to make sure they don't inadvertently inject/transfer scleroderma back into the face.
I hope your procedure is successful and remember to have those before and after photos ready for our gallery. If you want to, no pressure, of course!