Superman #211

In "You, Too, Can Be a Super-Artist!", Superman—disguised as Clark Kent—unravels a sophisticated art forgery ring led by the slick Mr. Sleek, taking on a bizarre challenge that sends him racing through time to stand as a model for legendary masters like Gainsborough and Rembrandt. With help from Jimmy Olsen, Lois Lane, and the eccentric Tony Van Dyck, plus a curious dog named Fuzzy and the enigmatic Professor Da Fony, the Man of Steel proves that even the greatest art can be a super-powered adventure.

In "[You, Too, Can Be a Super-Artist!] Part II: The Art of Racket-Busting!", Superman, posing as Clark Kent, takes on a notorious art forgery ring led by the slick Mr. Sleek. To expose the scam, he journeys into the past to stand as a model for the masters Thomas Gainsborough and Rembrandt van Rijn, using their authentic techniques to uncover the counterfeit.