I just spoke with my builder and basically put the onus back on him. I said the installer and manufacturer are both trying to put this on my shoulders and this IS BS. I said I am still within my builder's warranty, you KNOW (and he does, I'm freaking ANAL about my levels) that my levels are well maintained, and that I have a contract with you, not the plaster installer, so it's between you two to get this resolved. He of course mentions he does not warrant the "product" but I also reminded him that he does have to warrant the install, and we don't know what kind of shells he used. There have also been two "patch" areas that have always been lighter since the day it was installed (he literally added water to already dry plaster and "patched" some areas where the plaster job wasn't good). When I brought that to the installer's attention a month ago during their visit as well, he basically said "yeah that happens", like tough s$!t. So, after reminding my builder of the questionable install job, and the current spot issue, I said he and the installer can work out what to do to fix it, but I'm not taking on that responsibility so that Stonescapes can later try and weasel out of their warranty.
I am waiting to hear back from the builder, but I am hoping I get them to do it rather than myself. I also mentioned the need to install a heater bypass, because it will likely attack/dissolve copper from the pump coils, and then we/THEY will have ANOTHER staining problem to deal with. So, just waiting to hear back from my builder after he reviews what the Stonescapes Rep says to do and then talking with the installer. Although my builder is very good at dragging Rear, I do think he is an honest guy. He just kicks the can as long as he can.
So, if they DO do the wash, I'm hoping it isn't too harmful. I also read another post where they said not to wait the arbitrary 7 days, but to cease the process as soon as the stains disappear. Also, my builder never installed a heater bypass, so that could very likely be another battle to get that installed.
As far as the stains returning.....I've had it since March. I've only seen a FEW additional spots during that time, so I am hoping all of the proteins have been leached out so far.