Verslagen,

I am sorry, I thought you still had rust on the spokes.

Kenny G    

yes, I'm very unhappy with partially shinny spokes.
once I get all the caked on corrosion off, I'll see what I can do.  

If the wallmettos don't do the trick, I may tape off the desired shinny parts and use sand blast media.

right, but this isn't riding time, this is prep for use.
I'd be happiest with black spokes really.
half shinny half corroded not so happy.

I used to deal with crusty nasty spokes all the time, as a 'porter' at a car / moto dealership
just one of the reasons i HATE spoke wheels  

I have tried Walnut shells in a sandblaster.  They will remove carbon without making the aluminum or cast iron etched - but is does nothing to remove rust from steel or cast iron.  It also won't remove stains or corrosion from aluminum.

I have a vibratory tumbler that I used for removing rust from nuts/bolts before I have them plated.  The initial rust removal is done with ceramic triangles that have sharp edges to cut the rust...it leave the parts with a satin finish (The ceramic is dampened with water when cutting the rust).  Then the parts are dried off and ground corn cobs or Walnut shells are used to polish the surface.

If you want to remove rust....I believe you are not going to have any luck without something hard, like the glass, sand, ceramic, or those Black Beauty type sandblast grits that I believe are aluminum oxide.

Pouring in soda into this "tumbler" won't be the same as blasting it with high pressure.  Although being able to direct it at the remaining spots would speed up the process.

I'll keep going with the glass for another "day"
I've been running the drill at 50% duty cycle to keep it from overheating.

Wash the parts well, coat with an epoxy primer and a good catalyzed urethane top coat, and be done with it. Barring that courtesy of Commiefornia's environmental (emphasis on mental) regulations, tractor enamel.