Iron the canvas Prime with Gesso. I used my sons set of encyclopedias to hold the hem down until it was dry. Cloths pins left marks. I base coated both sides of the cloth. Then I painted on my design I sealed the finished painting with 2 or 3 coats of a water base varnish.
Spills just sponge right up.
Replace winter drapes with a light billowy fabric or sheet. Tie pastel ribbons around curtains as tie backs. Use miniature grapevine wreaths as tie backs on curtains. Seasonal silk flowers can be added. Any left over wallpaper makes a cheerful co-ordinated drawyer liner.