Upper control arms were assembled to the shaft with the bushings, then dip painted black. Ball joint added afterwards. So the shafts were painted to begin with but it did not adhere well. If you look closely at the Hot Rod test car it is apparent.
Very well done engine bay David!
Were the washer and bolts added after the A-arm was mounted to the frame, or was it part of the completed and painted assembly (minus the tightening of the bolts of course).
Washer and bolt were installed and painted with the control arm. The only vintage road test photo I know of where it is clearly visible is the July '68 PHR test of a '68 Camaro SS.