John Lawson dba The Sight Shop, in Tacoma, WA, does rust blue. He retored my Luger, and the bluing is beautiful. It's not what Colt did originally, but it has an "old-timey" look. I know, from a comment made by someone on pistolsmith.com, that he's rust blued 1911's before. John's been hanging out at pistolsmith.com, if you want to contact him.