you where wrong.... stainless steel does not rust.... normal steel does.
Actually you are wrong, stainless steel does rust as well as chrome.

lol....

its complicated but basically yes it does rust if you truely break down the science behind rusting. The only metals I can think of off the top of my head that does not rust at all and never will are Gold, silver and platinum.
Ferric oxide doesn’t form a continuous layer on the steel because the oxide molecule has a larger volume than the underlying iron atoms, and eventually spalls off leaving fresh steel exposed which then starts a deleterious rusting cycle. When stainless steel is exposed to oxygen, chromium oxide is created on the surface of the steel because chromium has a very strong affinity for oxygen.
The chromium oxide is a very thin layer which doesn’t spall off, and it prevents further oxidation of the stainless steel. Even if stainless steel is scratched and the chromium oxide layer is removed, a new chromium oxide layer will form and protect the rest of the stainless steel beneath it. As long as there is sufficient chromium present, the chromium oxide layer will continue to protect the stainless steel and prevent it from rusting..or at least what we call not rusting but it still is regardless.
A less common form of rusting in stainless steel is after the stainless has been exposed to very high temperatures, often in the 750-1550°F range (400-850°C)1. This type of corrosion is often seen in welding applications in which stainless is heated and then cooled. If this happens, “sensitization” can occur which is where the carbon and the chromium bond together in the stainless steel and form carbides.
These carbides situate themselves at the stainless steel grain boundaries, and the grain boundaries become deficient of chromium. With lower chromium concentrations at the grain boundaries, the chromium oxide protective layer can become discontinuous and rusting becomes possible. “Sensitization” can ruin stainless steel forever; however the damage can sometimes be mitigated with complex heat treating.