Exhaust is the long carbon one that I’ve just cut down to make it look stubby and the tank is back to bare metal then sanding lines before laqueuring over to give it the brushed alloy look. You can’t tell from the pictures but the decals have a brushed look to also match the tank.
Interesting project. Take care with clear over tank that you get good adhesion direct to metal. You could you a tinted clear and get a slight colour to it.