Need to make some fairings for where the fuel lines exit the fuel tank/center section. Had a “lightbulb “ idea to use a lightbulb as a plug to make a mold for fiberglass fairings. Made a plywood mount with beveled edges around a hole cut to extend a lightbulb through to the desired depth. Secured the bulb with hot glue, then filled any gaps with bondo. Sealed the bondo with sandable primer