Metallic-type thread - anyone have any advice about using it? I suppose most metallic-type thread doesn't include real metal (or is there a brand that does)? Is there some sort of industry classification one can go by, or is it just all guess-work? Any great sources on where to acquire it? Can you use it in machines, or is it mostly for hand-sewing? Any advice/experience in using it (did you use it for machine or hand embroidery, to sew on trim, etc.)? This is a general inquiry--I don't have a specific project at present, just wanting to open the discussion to learn more about it, and hopefully others will find the info useful, too. Thanks, Bees, for any insights you can share!