I soaked them in really hot water for about 20 minutes took them out and washed them off with just soap and water. After they dried, I soaked them in Alumabrite
for about 10 minutes and washed them off with a paintbrush and soap.
After they dried, I soadblast them, and afterward, I rinsed them really well with hot water and blew them out really well with the air compressor.
After you pull them out of the Alumabrite they will have a black film on them, Most of that will wash off with soapy water and a paintbrush. I didn't bother disassembling them because I have plans to do that when I rebuild them. I just wanted to clean them up before I even disassembled them. They have been sitting on a shelf in a machine shop for many years and were filthy.