Not always, and it could be cell rot from another razor stored with it.

This past weekend, I saw a razor, with cracked ice scales, in a glass case that was in full cell rot bloom, the blade completely rusted. It had infected 2 other razors on either side of it, but not razors in the shelves above and below it, yet…

The two neighbors, were finely rusted on the blades, where they were exposed and not between the scales.