First of all, I promise not to leave you, but don't take too long as I'm getting pretty old!
The only time the recky rifle ever looked shiny was when it had been recently rubbed down with gun oil. The outside of the barrel had a ridged surface. By that I mean there were tiny concentric grooves in it and that would cut down on the reflective properties. I don't know if they were just a result of the milling process or if it was by design. So the simple answer is the RR looked like it had a semi-matte finish - not flat, but not glossy, on all the unpainted surfaces. The OD parts had a slight gloss to them, but in scale I think they would look better matte, which is how I did mine when I built Lee Anne a few decades ago.
That was my first attempt at building an AFV, let alone a diorama, and in those days there were virtually no add-ons available for the Tamiya kit, which was the only one. So I had to scratch build the 106, primarily out of brass, and boil styrene sheet to curve the parts of the cupola and the M60 gun shields. Considering it was the first model I had built since I was a teenager mad about model planes, it came out quite well and even won a 1st place in category prize at the only show I entered it in. I'll have to put up an album of it but in the meantime here's a shot of the model, dressed as "Monkey's Uncle", the name of C14 in my books.
http://www.cibthebook.com/images/MonkeysUncleModel.jpgThe lettering was done in Photoshop, BTW. I then did a pen & ink sketch transformation in PS that was used in the frontispiece of "CIB-Combat Infantryman Badge".
The shine you see on the 106 barrel on my model is a result of the metallic paint I custom mixed from silver and matte black, if I remember correctly, and I think it looks pretty much the way I remember the real thing, but perhaps newly oiled. :-)
You can see four shots of the diorama as well as the pen and ink "sketch" on my book webpage here:
http://www.cibthebook.com/real_panthers.htmYou mentioned fonts in a previous post talking about Lee Anne and it brought a smile to my face. In 1967 that was a word not even in my lexicon. I used masking tape and cut block letters out of it then brushed white GI paint on to produce the name. You are lucky I didn't free-hand it as I did when I drove for my last of three Charlie Company Commanders CO's track. He wanted the name changed from "The Kingdom" to "Ship of Fools" (his name was Captain Morgan - like the rum) . I painted a square rigged ship with its sails all in disarray and the name all in yellow paint and I doubt a font exists to duplicate it.
"Charlie One-Four Delta standing by on your push, out." (push was GI jargon for radio frequency)