You do understand correctly. If you buy a brand new segment from a dealer, it will fit your Airstream's body, but will not be made of the same alloy as the original. So not only will it look slightly different, patina wise, but it is also a softer metal.
I had a front lower corner segment with a dent in it. I thought I would be cleaver and try to roll it out from the inside using a home-made dent roller. Problem was, that I used too tight of a radius on my roller wheel, and probably pressed too hard on it as well. This left marks (slight outward dents) in the segment. So I removed the segment entirely and tried to tool it with an English Wheel, but this just ended up distorting it further, since it was already deformed. I finally ended up replacing it with a brand new segment. The cost of the segment and shipping put the price over $500. It has a plasticoat on it that is very resistive to every stripper I have tried using on it. It has a brushed, duller, look to it, but worst of all, it is very soft metal, and I already have several rock dings in it from the few trips I have taken, whereas the segment on the opposite side shows not a ding.
If you can repair the segments you have, that would be my recommendation--just don't get too heavy handed with them, and don't use them to learn how to English Wheel. It takes a very light touch to work a dent out with an English wheel, but not distort the whole shape.
good luck!
|