Looking at the pictures it does appear that the tubes look to be in fairly decent shape. Even older faded zodiac tubes can have a lot of life left in them since the tube seams are thermo welded. However, all of the other seams, including floor seams, are glued and the bonds tend to fail with heat, time and sun exposure. It is easy to see that the material holding the rope hand lines is separating from the tube top. This is generally an indication that other glued seams may be ready to fail. The straps that go from the transom around the hull don't exactly make one confident that the transom bonds are good either. The first thing I would do is fill the inflated boat with water and look for leaks where the floor joins to the tubes. I would also look carefully for water seeping out along the transom seams. I did a bunch of repairs to my older zodiac futura and then got to experience taking on water through a leaking transom three miles offshore in a remote location in Mexico. When i got home I went around the vessel methodically pulling apart any glued seam and removing any glued accessory that would separate without damaging the coating on the PVC fabric underneath. A total pain in the ___. But after gluing everything I have a zodiac that doesn't leak, survives four wheel drive trails and surf launching. Even with the floor and transom leaking the boat floated just fine, just be careful and don't assume that everything is well bonded.
Stabond works great, but I hope you are aware of the humidity and temp limitations when working with two part glues. Have you seen the proper instructions for doing this work? Check this site.
http://www.allinflatables.com/support/pvc.html A seemingly good bond that has been made in humid conditions will have a greatly reduced strength. The humidity part is very important. Don't go by the newspaper, weather report or how the conditions feel. I bought a cheap hygrometer at Fry's and I was often surprised to find high humidity when it didn't seem like it would be a problem.
You can get top coat paints for the inflatable. They do work fairly well. I have seen inflatables coated with this two layer stuff that held up very well.
http://www.allinflatables.com/shopping/paint/index.html If the tubes clean up and the fabric has integrity the top coat is just cosmetic. I would just use 303 Protectant on the cleaned surfaces to help with UV exposure and leave it at that.
Old boats can be more work than they are worth, but if you have the time and the inclination you can bring your PVC zodiac back to life. Most of my flooring has been reglued, I have patches on my tubes and the transom was removed and reglued. Everything has held up for 4 years of major abuse. Good luck and maybe I'll see you and the Bay!
As far as model and year go, that information is stamped into the manufacturers plate on the transom. May be currently illegible. The plastic coating was long gone on mine and I scrubbed it lightly with fine steel wool so I could read the impressed letters and numbers by holding a flashlight at an angle and discerning the shadowed imprint.
!OH, And welcome to Ribnet!
I mean I know he is a transvestite and all that ...
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