Unless I'm missing something here, picture #1 being the shaft end of a belt pulley, I wouldn't worry about that the least bit. Looks like a casting or machined steel. If I were removing the pulley from the engine shaft, I'd apply some never-seize prior to re-installing the pulley, that's about it.
Picture #2, the flywheel? It's rare to see one w/out surface rust. What model Honda snowthrower is this? Any pics?
Joel