Surflight Theatre’s current production of “An American in Paris” is smooth. As smooth as a baby’s butt, as just-Zambonied ice, as an unruffled cat’s fur, as smooth as – well, a Gershwin tune.

UNREQUITED: Milo Davenport (Sophia Swannell) sure would like to trip the light fantastic with Jerry Mulligan (Hector Molina), but he would prefer to dance with another. (Photos by Pat Trotter Photography)

Director/choreographer Paula Hammons Sloan, a longtime Surflight favorite, has turned in perhaps her best effort with “An American in Paris.” It’s a musical inspired by the 1951 movie of the same name that starred Gene Kelly and Leslie Caron in her film debut, which won six Academy Awards including Best…