Scrap the canvas, sell the frame
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Time to profit by your prize. The canvas is fatally modern, but the frame can be passed off as antique. Sell it for silk.
A little chalk, a little resin
You age the frame a good fifty years. The patina is distinctive. Freed of all association with Bohemian artists and modern ideas, it fetches a fine price from a society matron. She claims to enjoy the sensation of being watched.