Replacing carpet in bunk bed/ front in a Winnebago View 23j 2006

[Sanne300]

Hi! I bought a used Winnebago view less than 1 week ago and started to repair the sagging ceiling carpet over the bed in front( I don’t even know the proper name for it..) I did some research and now ripped it of, began the cleaning phase of the inside and gave up after 1 hour.. nasty glue residue all over my body and it looks like the alcohol/ mineral spirit rubbing is not helping or I am to impatient...
Soo, I am hoping for some answers...
1.) is there another cleaning advice to get the ceiling prepared for the foam and carpet?
2.) noticed isolation( silver) through the whole MH but stopped under the carpet, can I apply the same isolation before I put new foam under or is there a restriction against applying the silver looking isolation material in the sleeping area underneath the foam? I am confused why the whole MH has that and where it should help, where you sleep, it is not, or is it just a cost factor?..
3.) I bought TEC indoor/outdoor carpet adhesive what you apply( no spray) and it ought to be good, question is I will apply it on the inside hull and the foam so basically in the first step not on the carpet / then carpet and foam, sooo on one point I am using it on materials not listed at all on the instructions, iis it still okay or are there better glues?..
Thank you so much, I read through this forum on how to repair a sagging carpet and it was very helpful, I think I understood the basics, but got stuck with the specifics..
I had a totally different trailer before ( Hi/Lo pop up) andI love forums and people who are willing to read so long posts and help! THANKS

[CharlesinGA]

Remove the panels, take to an auto upholstery shop and have them redo it. Some people call it mouse fur. Regular auto headliner material will also work. Some of min was coming loose when I sold it, that's what the new owner had done, at an upholstery shop.

Charles