Anyone know the rhyme or reason for paint swabs on disc brake spindles.? My 70 442 project car came with manual drum brakes and they have to go. Not a fan. I located a nice disc brake set up and I was cleaning the spindles and the left side has obvious green swabs and the didn’t care how much they used. The left matches what I have seen on Buicks and other Olds I have seen, the funny thing is the right side had small amounts of red paint mostly hidden under dirt. No green at all on the right side. I will replace as I found them, any thoughts?

 

Left side

 

Right side

 

Identification, what shift, inspection mark, vender supplier, the paint could mean lots of things. Rest assured , those paint marks meant something to someone.