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[quote=Rider_55][quote=motogon]It is not accessible from inside (unless I cut hole on top of hull, and I don't think this is such good idea). Why not just remove all damaged fiberglass in crack area and fix it from outside? I can put few layers of fiberglass with same polyester resin.[/quote]

It is possible to make this repair effectively from the outside; however it will be much more difficult and labor intensive.  You will have to cut out the bad glass and then taper the good glass back several inches so each successive layer of new glass bonds to old good glass.  I typically sand back about 1 inch per layer tapering down to the full glass thickness at the damaged area. Sanding to restore shape and smoothness will be a long process.  If you add an inspection port the tapering part of the repair is eliminated as everything is inside where appearance and smoothness are of no consequence.

[quote=yurdle]1st, don't use csm with epoxy. You can get or make milled fibers if that's what you need. [/quote]

CSM is essentially just milled fibers pressed into mat form to ensure a random fiber orientation to eliminate the possibility of uni-axial reinforcement which mixed milled fibers may provide in a location where application will be difficult.  I agree that CSM is typically not used with epoxy as delamination of mat on mat glass is not a problem as it is with polyester resin; however, working in a tight angular space with restricted access getting mat to conform to the sides can be problematic so I recommend the CSM be used as it conforms easily to irregular shapes when wetted out ensuring a good bond for the repair.

[quote=yurdle]For the 'bottom job' an epoxy wear strip will be just fine and far faster and easier than laying glass and gel coating it. From glancing at the pics it looks like you can fill the dagger trunk chips w/ thickened epoxy -- quick and easy. [/quote]

Either way will work fine for function but IMHO unless the boat is to be painted, the poly and gelcoat combo is more aesthetically pleasing however it will require about 2 times the work.[/quote]

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