Re: rookie makes another mistake(HELP)
WOW! I know a few choice words were said when that happened. It looks like it is ground pretty thin. I hope that there is access from the Inside as well. If there is good acess on the inside I would sand and put a couple layers of thick glass 1708 etc. this will help hold the shape. After the inside is cured sand the gnarled side nice and smooth go past the damaged area and get to the good glass . Start layering glass until it is close to original thickness sand fair it out and re gel . There are a few videos on youtube to help with the gel and glass repair. Buy good resin not the Home store stuff.