1) is the trans brace for automatic bare metal.
The transmission brace was bare steel. If you want to get detailed you can reproduce the dark bluing where the separate pieces were welded together (from the heat of the weld) and or reproduce the stretch marks and details that took place during the bending/shaping of the longer piece
2) is the reinforcement piece on the bottom of the vehicle as bare ?
The convertible brace (this year and plant) that bolts between the drivers and passenger floor brace was painted the slop or batch color similar to one of the multiple tints that have been found on the shock tower support brackets, battery tray, coil spring covers and a number of other items at the front of the car. Often a darker grey with a tint of blue or green to, in some cases, almost black
Hope this helps