Help. Hull repair from the outside...how many layers of glass?

[bumpdraft]

I may be missing something, but that bad area on the boat is behind (to the rear of) the v block. The next time you go out in it, spray some paint or something over that area, then check and see if any paint rubbed on the axle, or if there is a brace behind the axle.
Come to think of it, when I had one of those single axle trailers with the little fat tires, it would partially float. I would have to be careful with the deep v on my 18.
I took a few pics of a friends trailer (mine is about to get a face lift).
A brace was added to the area to the rear of the v block. It took some pressure off the v as well as stiffened the trailer. You should probably put something between the bunks and the I beams for more clearance. Newer trailers have spacers. The bar for the posi-lock was replaced recently on this trailer. Things can be replaced as long as the main beams are still good. No need for a new trailer, unless you get a screaming deal on a shiny new one.