If you've never tried EvapoRust, it is great though pricey. You might need 2 jugs and a plastic container just the right size for the LCA. Scrape off as much rust as you can so the EvapoRust lasts longer. You might follow with a dip in phosphoric acid ("Concrete Etch & Metal Prep" at Home Depot) to convert any remaining rust in pits to black iron phosphate. A member in Sacramento occasionally sells restored Mopar suspension and brake parts and uses EvapoRust.