[Aarons72s]

To get all the old rust, grease and paint off dunk them in a mixture of muratic acid and water. Strips it all off quickly. I use it to clean up all my rust encrusted parts. Just be sure to do this in a well ventilated area and wear protection. You will also need chemical resistant gloves. As the fumes are strong and the acid will burn you. They sell this at hardware and pool stores. I got a 5 gallon bucket, 40% acid to 60% water, to dip parts and stuff. As for keeping them from rusting when done paint them or plate them, your choice.