Winds were variable at 5 knots, gusting to 10, with the wind tee and windsocks indicating runway 33. The pilot executed a wheel landing but began losing directional control to the right just after touchdown. He countered with left rudder, but the aircraft began to ground loop. The aircraft swerved left and scraped the right wingtip. He then attempted a go-around, but his right wingtip struck a sign and the aircraft veered right and struck a fence.