Does anyone know (from experience) a good product that I can use to patch a small hole (golf ball size) in my front bumper cover? I've researched many products but can't seem to find anyone that has ever patched a hole, mended a rip, or repaired a crack on a 78 - 81 Camaro urethane bumper cover. The hole is on the front left corner, which is stiffer material anyway. Someone previously used bondo and it looked to have held for some time until it was bumped by another car and busted out. Thanks in advance.