Mettler silk finish, Superior Bottom Line, Masterpiece and So Fine for piecing. Sulky, Madeira rayons for machine embroidery or Isacord and Superior Rainbows. In the long arm best luck with the magnetized type of pre-wound bobbins (magna glde), Superior masterpiece, KingTut or rainbows in the top.
Just bought aurofil (Madeira makes it I think) today to try. Dislike Gutterman -- too linty!