“Stainless” steel is of course corrosion resistant, not corrosion proof. Fortunately it is quite good at resisting day to day influences that quickly can mar blued carbon steel.
Unfortunately, when it does finally overcome resistance to corrosion, it does so with enthusiasm and instead of getting surface rust or freckles, it goes whole hog with deep pits seemingly instantaneously.
“I hate when that happens.”
Froggie