I just saw an ad in the June Lapidary Journal for a product called "Firescoff." Their website is: http://www.nventa.com/firescoff.php They say it prevents fire scale, acts as a flux and you don't need pickle to clean up after soldering, just warm water.
I saw that article too and am very curious about the product. I think
I will get some and give it a try. Will let you know what I think. I
noticed in your website that you use that Platinum Sterling. What can
you tell us about its working properties?