I picked up a Trek 720 Multitrack with galvanized spokes .078" diameter. The rear spokes were rusted from the X point out to the rim. Visible threads not bad for rust. The nipples are aluminum. In cleanup they got mild soap and hot water, air dried. Next day I went over them with green Scotchbrite followed by a wipe down of Liquid Wrench Silicon Lube allowing some down into threads.

The climate is dry and dusty, Baja California Sur.

I am just getting back into bikes after 50+ years. I am new to forum and have not seen any comments on use of silicon spray on bikes.
It worked like a solvent and removed old dried oil and grease from ends of hubs and the gear sets.