most of them are "Consew" hammered industrial Silver colored....... I think gloss black auto enamel would be in order.
the lever on the base near the pedastal is feed dog drop, the one on the arm lowers the bulb for changing, it has an "Automatic threader " built in ....most likely does not work but I dunno something about it says well built well designed and made of bolts and nuts to service .. not rivets and spot welds to replace...