Gary, isn't the concensus that originally, any scratches or bare spots (i.e.: uncoated rivets) were spot sprayed with Pyroxylin Black paint?
The one thought provoking point that comes up (at least to me and a couple of others) is the point where we are supposed to "freeze time" and judge each vehicle is 'as it rolled off the assembly line'.
Japan Black is thought of as a dull, loss-gloss Black yet the MAFCA published Paint & Refinish Guide states on page 15 that the frame paint had a large percentage of asphaltum and mineral spirits. When I have looked at large blocks of asphalt tar at a roofing supply store, they have been moderately glossy in the flat areas where they were split open. Now I have no clue as to what the exact mixture was between the JB and the Asphaltum, but several years ago I crushed some asphalt roofing tar and mixed it into some Japan Black that I also mixed (which again is a slurry of tar, mineral spirits, and some Gilsonite that a friend of mine had been experimenting painting his Model T with). My concoction looked like a thick used motor oil that came out of a diesel engine. Since I did not want to try to spray it through any of my spray guns, we poured and/or dipped the solution on several pieces of steel and allowed it to dry. For about a week it stayed "printable" to the touch, AND it had a sheen to it until after it had dried. At that time I did not have my new powdercoating oven so we did not bake it but later I did mix up some small pieces and bake them just to see what it did. The biggest thing we saw was the heat actually caused the stuff to 'run' and sag and be thinner on the part but it still stayed more glossy than what some people seem to want to believe. Again, I have no idea exactly what the composition of the Japan Black was originally, or what the make-up of the Asphaltum was, --nor what levels any of this was mixed at. I also do not know the time frame from when the frames were originally painted & baked until the time they were on the finished vehicle going out the door.
The "key word" in what Gary is asking is 'judging' in my opinion. I think it really depends on whose competition we are entered in. The Stds of which both clubs have adopted clearly states on page 12 in the left column, bottom paragraph NOT to use any outside technical knowledge unless it is printed in the Stds. It also goes on to say that "The measure of a restorer's efforts shall be evaluated against the Standards and nothing more". On page 4 in Area 4 under FRAME ASSEMBLY, it states that frames were painted black and no parts were rubbed out. PERIOD!! No where can I find in that chapter does it refer you to the MAFCA Paint & Refinish Guide for guidance on the different levels of Black, or how thick/thin the paint was, or whether there must be stamping marks visible, --nor does it say you cannot use powderpaint. It does not even say to look for over-restoration on the frame. All it says is the "Frames were painted black and no parts were rubbed out".
Now none of what I said above should ever be construed that a restorer cannot try to think through and mimick what these finishes might have been like originally HOWEVER Gary's question is "For judging, should the ..." and the answer really should be any type, or gloss-level of Black is acceptable and receive full credit. Naturally if a restorer wants to detail the frame by using these different levels of gloss and texture, my thinking is this should be acceptable however no extra credit should be given as it is written in the Stds. If I am in error on any of this, please show me and I will gladly retract my thoughts.
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