 The bodywork for the concept car displayed in 1988 was hand built from aluminium by Park Sheet Metal , a specialist automotive engineering company that manufactures concept cars and low @-@ volume , niche models for various manufacturers , including Bentley . <unk> Coatings undertook final painting of the <unk> in silver . The concept also featured electrically operated scissor doors and a transparent engine cover to show off the V12 engine . 
