A friend restoring a 66 GT350, got a pair of NOS upper A arms from e-bay. The steel was dark gray, the correct ball joints were riveted with the correct checkerboard pattern, there was no shaft installed and they were not dip painted (I did that myself and installed the shafts). The factory arms were about the same dark gray stamped steel color with the shaft end dipped in semi-gloss black up past the spring saddle mounting holes but before the ball joint area.
Jim