Pardon my ignorance on some of the terminology but have a friend with an older center console that hit something in the water that broke off a few layers of fiberglass leaving only one layer in tact, and then hydrauliced water causing delamination a few feet back... Theres access to the cracked area from a storage locker but doesnt go back as far as the delam.

He's gotten a few repair estimates that range all over the place....

1 - Cut up the floor and seat bases to gain access from inside the hull and the grind away delamination... and then lay new glass and spray gel coat from outside and finish
2 - Another was to grind all the glass from the outside, and then lay the new glass from the outside and spray gel coat and finish
3 - Another was to grind and lay new glass inside storage locker where possible, and everywhere else to drill a bunch holes almost all the way through (leaving last layer of fiberglass) and inject resin with fiberglass strands mixed together to fill the delam voids, and spray gel coat and finish.

I am assuming option 1 is probably the smartest thing to do, but he does not think insurance will cover this route, leaving #2 and #3 with similar price points.

Which would be the preferred method... drilling and injecting the epoxy/strand mixture OR gridning away from outside till he finds fiberglass thats not delaminated and then laying all new glass over it?

Not sure on brand... Ill have to ask him (off top of my head might Chris-Craft but think they'd be cored?)

Either way it's NOT cored bottom.

The proper fix is to grind out the damage/delam to solid material and build the laminates back out, fair and re-gel.Whether a shop attacks from the outside vs. bilge depends a lot on access/ making time.

Best bet is to contact his insurance and speak with an adjuster - if he has coverage, his boat should be repaired...go with a reputable company and get references.

Just grind it out and reglass it. If its in south Florida, bring it by and I'll fix it.

Don't you just love it when owners cut corners and sell the boat "As new" a year later...