I'm continuing to restore some driver level SSIIs. Coated them with Rust-Oleum restore on all services, then semi-gloss black on back and side. Then laid down an initial coat of Rust-Oleum High Performance Wheel paint (new product to me) in graphite. Then misted with Motor Company SSII Argent grey. As you can see by the pictures if one wanted an inexpensive option I think you'd be fine in sticking with the Rust-Oleum Argent.

See below

Rim on left is unpainted sandblasted rim, rim on lower right is Rust-Oleum Graphite, upper right is with final coat of Argent Silver.

 

Prismatic Powders
Forged Charcoal
UMB-6578
A little more travel at different viewing angles than original, but not too much more.