Originally Posted by Mnf
Sorry about that, definitely! Here are a couple more photos. Essentially it is the back 2 corners of the trailer. One crack is where is is bolted to the trailer and on the opposite corner is seems like maybe from hits the fiberglass weakened from the outside? You can see lighter holes and damage from the outside.
I have just finished a restore on a 1973 Amerigo
FG16. I didn't have any floor repairs like yours but I did makes some changes that required some big fiberglass changes.
Your floor repairs could be caused by it being wet and freezing and thawing. If you can see fibers or the sparkle from them, those same fibers will absorb water, then is it freezes it will expand and weaken to whole area.
I removed a small storage door that was recessed so that I could install a new style furnace
in the space. I saw som YouTube's where they repaired canoes using stretch wrap to span the hole.
I did that and backed it up with some 1/4" plywood backing it up, it worked great.
I did several layers from the inside, then removed the plywood and wrap. I was pretty close to a good patch. I did put another layer on the outside then started blending it in with Bondo and sanding. My patch it as strong or stronger than original work. Get a bunch.of disposable gloves and throw away paint
brushes and get to work!