On the '52 'Burb's spare tire bracketry it consists of 2 rails that attach on the frame underneath the rear plywood floor. And, a 3rd tire holder bracket, which only 1 nut the size of a lug nut for the wheels was removed. That special nut is the most important feature because when you need the spare, you use your tire iron tool to remove it & the tire comes down.
Next I cleaned off the rust, soil, & undercoating using the electric grinder with sand paper discs to find the paintable steel. The undercoating really helped keep rust away from the 71 year old steel. I used acetone to wipe the steel down & rattle canned those unattached rail & tire brackets with black enamel paint. The other 1 rail needs everything done, as I burned daylight pretty quickly messing with this spare tire mechanism (see pics). Hey my TX Stovebolt Brother - will do - let you know how fitment goes on rubber pedal pads on order from LMC Trucks!