I use a crinkle finish on a can from the UK's large motor store (it's own brand) and after spraying I let it dry a minute or so then place in a warm oven (electric NOT gas) , that gives the best crinkle finish and is close to the original. I only use that on the focus hood on Pacemakers and the exterior of the back on a Super Graphic. The Other parts I use gloss black and a very light coat of satin clack.

The original colour is definitely black but it's aged and looks duller. Paints from the era Graflex made these cameras age over time.