@NOPEC Man you read my mind on a lot of your suggestions.. I bought some bondo resin for the smaller holes and I'll lay that up with cloth. For the bigger holes and the roof repair I think I will do the west marine 105/205 system. I starting ripping out the rigid foam today. So much of it was water logged and delaminated.
Did you ever go down to the shell? Do you know what they glued it with? It's all pink..
Just checked those marker lights, they are perfect (3/4" LED)
Oh, Im going to delete the city water and drain. If anything I'll have a 2 jug system.
I had 5 windows in mine, 2 on each side (lower/upper) and a center one. I deleted the center one today I thought about removing the left side one in favor of wall to wall cabinets. Maybe an A/C too.. So many ideas...
Almost done the gut... the floor was pretty bad from the so called "repair" the owner did. Rotten... After I seal everything I think I will epoxy in the new foam....
Good For you, the gut is going well.
Couple other things to add.
Yes, I did get down to the inside of the exterior shell in a few places, but nothing as extensive as yours, my campers started off in much better condition than yours. I had the same pink stuff, I think it was some sort of non permanent contact glue, it was still tacky in a few spots after all of the years being in place.
My last build, the radicalish one, had a different objective than I think yours does. We wanted the "New Old Perfect Expedition Camper" (thus my Avatar.....NOPEC) to be as good as the fancy dancy late model Bigfoot 8.2 we had, but just simpler and with all of the systems that we wanted and none that we didn't want. So I built it exactly the way we wanted it, not holding back on anything once it was decided on. Our situation is different in that we are retired, childless, travel a lot all year around and are well into senior citizenhood. So we wanted good cold weather performance, pressurized water, the shower, convenient stovetop cooking inside, N/S bed and especially, the bathroom. (your day will come.....). So this build worked for us and is different that your needs as you have described but hopefully, some of the ideas might be of some use to you.
We too got rid of the external city water and fill spigots. Glassed over. We replaced our original water tank with a new one and included a 6 inch top cleanout hatch so we just fill with a hose from and screw on filter from the inside, right into the tank.
At the back end, couple of thoughts. We glassed over our back hatch (like yours) and built our interior cupboards so we had access to the same space from inside. My experience, especially with propane hatches located at the back of the camper is that the water and mud just swirls around back there and seems to inject itself into everything. It is hard enough keeping the door moisture and dust sealed, without having stuff back there you don't need.
I added a stainless Steel/LED exterior license plate bracket which did I had my interior ripped apart. Totally easy. With the length of these 8+ feet campers, it is hard to see the license plate down on the bumper. I like having it up so that the police and the border crossing cameras can see it easily.......
I am sure the crappy RV quality "door hold latch" has mostly disintegrated by this time. There are nice SS ones out there that look pretty snappy, will last and work really well.
Still trying to fill holes, I went to surface mount LED taillight instead of having the honking big holes that came from the factory. Glassed over.....
Another product for small areas that I have used with great success is PC-11 white epoxy adhesive. It is two part, equal amounts of A/B, very easy to apply and is rock hard when dry.
Anyway, just a few more thoughts. It is Happy Hour in BC so will leave this here. Cheers