Suggestions for fabric paint for stamping?

Hey all, I'm looking for some advice here. I need to stamp fairly fine lettering onto a silk scarf, preferably in metallic silver. The result needs to be permanent, flexible, and washable. Anyone have a favorite brand of fabric paint for stamping? I tried Lumiere applied to the stamp with a foam brush, and that didn't give a clean image. I'll head to JoAnne's or Michaels tomorrow to pick up some other options to try, but thought I'd get some advice from folks who have been down this learning curve before.