I followed a great video on youtube by scared shiftless that shows how they restored a 68 Firebird. My Master Cylinder is natural which could be duplicated by Eastwood Cast Blast Paint called spray gray My booster is gold cadmium plated and Eastwood makes a kit to duplicate this look My rear axle tubes are natural and here I used Eastwood's natural metal paint called detail gray The differential is cast iron and I used Eastwood's spray gray on it and detail gray on the cover I used Eastwood's Zinc Phosphate on the leaf springs. I finished it off with retro factory tags and paint marks as shown in the scared shiftless YouTube clip Hope this helps