Rust on Wire chair  

I think it requires some sort of electro plating bath
much like in the auto industry before painting. Basically, strip, dip, pick a paint chip, and a paint or powder coat booth trip. Check in the yellow pages for a plating company.

Simple - the shop you spoke t...
Simple - the shop you spoke to are wrong. If rust is some kind of deadly 'virus' affecting ferrous metals then there would be no 150 year old metal bridges or structures left standing would there? So if you blast them clean and coat them they will be fine - for as long as the coating is fine. If the coating is compromised (cracked or chipped etc) and moisture allowed to reach the base metal then of course they will rust.

rust needs oxygen
since rust is actually iron oxide, iron cannot rust without oxygen. if the coating used will keep the iron free of oxygen, by definition it will also be free of further rust.
of course, if there is a failure in the coating itself or in it's application to the extent that it exposes the iron once again to oxygen, it is again subject to corrosion.
as i understand it, it's really about that simple.

Appreciations
Thus far! To calirfy, it was I using the virus analogy not the powder-coating rep, and I was using it loosely. Recall reading up about metal corrosion years ago and virus being used as a example.

RUBBER
I Have been thinking of trying to spray my Bertoia Diamond chairs with spray on bed liner. They can do all kinds of colors and I think this may be a solution for this problem!