Hi guys. Was just wondering if anybody ever seen this before. Took apart my springs on Saturday and epoxy primed them. Seen a bit of something on them but didn't really notice anything until we put the first coat on them yesterday. My body man let them dry and I went out to see them today. We took the DA to the worst section to see if it was a reaction or something. When we got down to bare metal you could see it. It looks like slag when the springs were made?? Any Ideas? Would there be a way to fix it? Sure most of it is hidden but just wondering if high build primer would work on a spring? I was kind of wondering about the pitting also from rust? I'm kind of disappointed with them. Thought I would bend your ear. Here is a few shots of what I'm talking about. I forgot to mention I did sandblast them first.