Bought a 100% cotton canvas tarp this afternoon.
Popped into the local disposals store after work, just to look around, and found they have a range of quite suitable, Indian made canvas tarps. Colorfastness (is that a word?) is an unknown yet, but this is as good a starting point, as any, for the roof cover of my Sunshine Cab. Don't think dyeing would work if the damn thing fades too much. The tarp has had a wax treatment during manufacture. The presently primed roof is begging me to paint it, so I've really got to do the canvas bit before I get the paint on, and DEFINITELY before I get the impulse to install the roof onto the rest or the cab itself. Once on, it would be VERY difficult to manufacture the canvas cover. I'm not tall enough to reach that height, and there is no room for scaffolding im my workshop.
Elvis put it best; It's Now Or Never!