So i have added new transducers and in the process I had to fill a medium size hole where the old through hull ducer was. I layered west epoxy thickenedwith 404 filler and multiple layers of woven fabric to patch the hole. I have 1 low spot that needs to be faired out. Should i use epoxy mixed with micro baloons/ 407/410 for the final fairing? what kind of finish coat do i need to make this thing complete? the boat is gel coat, and all i want is functionality and final sealing. Im not worried about showroom glass work. thanks for the help. heres a couple of pics.