RV Repair: repairing rv wall, rigid insulation board, pace arrow

Question
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Followup To
Question - Thank you for your answer. The problem is that the fiberglass has cracked. I know the fiberglass can be repaired but I don't know how it will look on the outside. Could you also tell me what kind or type of glue should be used?  Would you also know where these products may be purchased and if there is any kind of manual that I could purchase Thanks again.
I have a 1988 33'class A Pace Arrow model 33j RV that had a water problem in the wall and is now buldging out. The dealers estimate was so big that my insurance won't cover it, so I'm forced to try it myself. I would appreciate any information you could give me about the make up of the walls or cutting it open and repairing it or if there is somewhere I could find that info. THANK YOU
Answer -
I will assume your Pace Arrow has sandwich wall construction: fiberglass skin, rigid insulation board and paneling on the interior.  Water probably delaminated one or more from the other and I would work from inside out by removing the paneling, cleaning and replacing the foam board and leave the skin in tact.  Rebuild by gluing everything back together in reverse order and trying to make the interior look decent by using another wall treatment like wallpaper to hide the patched area.  I do this all the time and as long as you try to duplicate what was originally there, it should come out OK and you will be the only one that knows how it was.  

Answer
When I repaired my Winnie, I started by contacting Winnebago for a drawing of the original construction detail, a list of original materials they used and set out to find where the materials were available and duplicate what was originally there.  I would suggest that you contact Fleetwood and ask their service department for directions on how to procure the particular materials you will need for the patch. The only way you will ever exactly duplicate the original is to literally purchase the entire side panel to your coach and that is the way insurance companies usually look at repair estimates.  A good body shop that specializes in fiberglass might be able to lead you in the right direction also. If it were me, I would make a "plug" out of the original materials that is a little larger than the area damaged, press it together like the factory originally did, cut out the damaged area and fiberglass in the new plug matching the exterior and interior the best I could.
With basic tools, I would make it look as good as new but I am a perfectionist and that's just the way I am. It sounds like this might be a little more than you can tackle, you might want to take what the insurance company gives you pony up the rest.