I finally made up a few PVC pipes and put ER to the test. I was a bit skeptical but it's made anything that's not already pitted look like new. I have some old system 11 legs that cleaned up to look like new. Did a lockdown bar that had underside rust that came out great and a 70's Bally chrome lift channel that was rough come out pretty nice. Excellent stuff!
And no, I haven't seen it for cheaper then $23 at my local Advance Auto either.