Sutherland had unwittingly purchased the paintings from a forger in California on eBay.
Had the image been painted on the cloth by a forger, the paint traces of the pigment would have remained on the surface.
Of course these are derivative, too, almost as though Serra were his own pupil, or a forger of his own pieces.
late 14c., "a maker, a smith," agent noun from forge (v.). Meaning "a counterfeiter" is from 1550s.
late 14c., "a smithy," from Old French forge (12c.) "forge, smithy," earlier faverge, from Latin fabrica "workshop," from faber (genitive fabri) "workman in hard materials, smith" (see fabric). As the heating apparatus itself, from late 15c.
c.1300, "to make, shape, create," from Old French forgier, from Latin fabricari "to frame, construct, build," from fabrica "workshop" (see forge (n.)). Meaning "to counterfeit" is early 14c. Related: Forged; forging.