Watercolor on 140lb Fabriano cold press paper, fixed to stretched canvas. Experimenting, thinking this is what I will do for extra large watercolors. I used acrylic gel to fix the paper to the canvas. No problems. The next painting I'll buy a roll of watercolor paper. Arches 44.5" x 10 yds, cotton, watermarked 140lb cold press, rough. $153.60 ... $119 at Blick. Work up to 60x44"
Commissions welcome! Have to work this out, but given material costs, I expect I would have to ask for $800 to $1200 for the largest work.