Are 'rustproof' stainless and aluminum claims actually accurate?

Mostly yes for SUS 304 stainless and anodized aluminum, according to a recurring r/BuyItForLife observation that anodized aluminum creates a protective layer that's nearly impossible to rust. Cheaper chrome-plated steel caddies, by contrast, are the most common rust complaint in long-running Reddit threads, so the material spec on the listing matters more than the word 'rustproof' in the title.