Baby steps, but the nipples all turn freely, so I was able to completely detention the wheels, mostly with my fingers. Took some brass wool to the rusty spokes. I understand that once they've rusted, there's no sense trying to preserve any zinc coating, so you might as well scrub away and wait for the rust to return. Most of my experience with spokes has been with stainless, so it was interesting how flexible these feel. Must be due to metallurgical properties? Dust seal pried up without trouble, so it looks like I'll be able to flush, grease, and ride!