We're close to getting a contractor to resurface and tile our pool. I've decided on Universal White Cement plaster and I almost have the contract down to what we need. We have what I think are rust issues coming up in our pool which I'll try to attach. The biggest stain is about 5" in diameter and spreading. A second one has popped up as I'm getting bids. It looks like it's coming from what one bidder called calcium nodules. One person was convinced it was my water chemistry, so I sent that day's report to him which proved otherwise. We aren't perfect but I'm not sure this is what it could be. From what I've read on the internet, the way this is repaired is to cut out all rusted metal (which I thought was supposed to be 3" below gunite), treat the ends with rust inhibitor, then fill with hydraulic cement. Since workers found rusted rebar in a replaced skimmer about 2 yrs ago, I am replacing tile and doing a full chipout. My questions are 1. Am I following the rust process correctly? 2. Is the gunite bonded on complete chip out? I have one telling me no, which is what I understand to be correct and one telling me bonding after complete chip out is how it's done. 3. In the meantime, I've disconnected the salt generator and I'm using Cl tabs unitl they come to fix it about April 29. I'd appreciate any thoughts.