Ed & Debbie
The secret to success of metal replacement is not the kind of rivet, but in the quality of the labor.
Olympic rivets have been around since the early 70's.
Done properly, metal replacement anywhere on an Airstream trailer or motorhome using "olympic" rivets is equal to the "buck" rivets.
The olympic rivet was designed to save labor costs, without sacrificing the quality of repair.
On the other hand, a buck rivet job, can be just as bad as a poor olympic job, again depending on "how it's done."
After market metal replacement, requires an injection of "Vulkem or Sikaflex sealer" within the seams to insure a "positive seal."
The theory of "keeping it original" holds little water, when it comes to resale value.
Again, the key to it is "the quality of the labor."
The only issue with olympic rivets is which one to use. There are two types, one with a washer and one without. The washer is neoprene. Neoprene being what it is, expose it to hot weather, over time, and the washer "will" fail, which in turn, probably will fall out, and possibly causing a water leak. Additionally, a washered olympic rivet allows you to put your finger nail under every rivet head, making the repair job less desireable.
The washer type olympics in our neck of the woods desert, have been known to fail in less than two years. Also the washer type olympic rivet, in my opinion, is a sorry excuse for a quality repair job, in that your depending on it to "not leak." Good luck if you use it.