I tried metallic thread once and had no luck. I recently made 4 Christmas tree skirts and used Glide thread. It's got a nice sheen to it and looks metallic, but was much easier to work with. The colors I used were Dijon (like a bright gold) and Sand (a softer shade of gold). They have other colors that also look metallic. Here is my post about it:
http://www.quiltingboard.com/links-r...e-t251665.html