This boat came to me with a big chunk missing out of the bow shield - probably 2" long, 1-1/2" wide and close to 1" deep. Glass looks OK around it, and the protector is bonded fine. I'm assuming that it's Hamby and original to the boat. I had filled it with urethane flashing caulking but that doesn't cure hard enough, and the ragged edge collects weeds. Any ideas? Thx!