My perception is that there has been a shift toward using TB2 as the glue for the canvas instead of paint.
Rather than do the canvas design like paper mache to get a pattern, why not cover with one or two colored or patterned panels and applique the highlight features over the top? In other words, say you want a two tone panel with light color high and dark color low, you could drape one fabric over the top and lap the other up from the bottom getting a good sock effect (either or both could have patterns); then cut out and apply any special high light logos or designs, such as a big printed flower or whatever, over the top like a decal. Then you would just need to see how much the untinted base would effect the color (IIRC Woodbutcher said it yellowed or fogged a bit).