Fiberglass botch job?

[69ChrisCraft]

Hey guys, I had another thread in which you all helped me determine the model of my project boat (Reinell Coho). I have pulled the drive, motor, and fuel tanks. The transom and stringers appear to be in great shape but I came across some odd de-lamination of some glass under the fuel hatch. I’m wondering if it was an attempt at repair that and will compromise the integrity or perhaps the guy just reglassed some stringers when he did the major overhaul (2005 he installed a 5.0 MPI and new fuel cells). There appears to be a carriage bolt head under the hull and bottom painted over? I can’t tell if it is directly in line with a stringer and delamination or perhaps something plugging a prior thru hull?

 

[69ChrisCraft]

Just realized my video of the delamination didn’t post and don’t think I can.... I’ll try and take a pic that shows.

 

[sueno]

....

 

[69ChrisCraft]

Here is the video. Any help is greatly appreciated

 

[tuner]

Start grinding!

 

[Fishbones]

Probably did the repair with Polyester resin which does not bond well for repairs. Need to at least use Vinylester resin or epoxy for the strongest repair

 

[Reefer]

Among other things, I'd remove the bolt, probe the hole and plan on filling it properly as part of the overall repair project. I'd remove delaminated glass and chase the problems as far as they go. More surprises seem likely.