Clockwise, from left:

• This Cylon Warrior is a European garage kit bought from Comet Miniatures. The metal parts are covered with Bare Metal foil.
• Terminator II model by Tsukuda.
• The excellent Tsukuda ABC Warrior from Judge Dredd. I added lights for the eyes (not seen in this photo).
• ERTL's Robot from the Lost in Space movie, also lighted.