To clean them up: Simple Green, POR-15 Metal Prep, 2 coats Napa Self-Etching Primer (7220), then Rust-Oleum Bright Coat Metallic Finish. Not perfect (I could have sanded them more), but I think they look good, and original. These might be parts to get zinc plated in the future.
Rust can create a lot of problems, the product you used to clean these fuel injector rings seems nice, will check for it in my local are market.
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