Hello, I sure hope someone can help with this...
I have a 1980 modular home that is wallpapered throughout. Evidently the drywall is covered with wallpaper before the walls are put up. You know, thin gap every eighty inches or so that is covered with a thin strip that matches the wallpaper. I want to know if I can mud the gaps, sand, then prime and paint the walls. Or will the mud just fallout/off? Please let me know how this works. I'm gong crazy! Thanks in advance.
Goinnuts

You can remove the strips from the seams and fill them with sheetrock mud. I dont think it will need sanding if you use a putty knife to level it out really well. Then I would prime with KILZ or something or that sort and then paint it. Should turn out well.

I have the same type of house, you do need to sand the walls, it will not take that long and look better.

maggie

Thanks guys! A man at Ace also suggested I clean the walls with TSP then fill the spaces with Lightweight Spackling using a puttyknife for less sanding. Then, like you said prime with Kilz before painting. I never thought of lightly sanding the walls. Sounds like a good idea tho. So, I will use both of your
suggestions. Thank you both so much! Because of a "Loud Cha-ching!" this week, I'll have to sl-ow-ly continue to get my supplies together.
Another question: When I had to have my floors replaced, "the genius" pulled the floor trim UP when he took it off and of course it ripped a large section of the wallpaper off! Any idea what to do about that? It's in the bathroom by the way and I'm worried about damp.

Simply spackel and sand the damaged area. If you want something a little harder try using the spackel that comes in a bag. You mix it and use it. Its chemical action hardens the spackle the result is a harder more durable finish.
Simply pour a coffee can size amount in a five gallon bucket add some clean cool water and mix.

It comes in various hardening times. I suggest you use the 90 min stuff as this will give you plenty of time to do the job. Clean the tools and bucket once you have the stuff on the walls. You need to move fast as the warmer it is the faster this stuff drys.
It can be sanded in a few hours and feathers out quite well.

Thank you so much for the info. As soon as I get a little more money together I will sure try that. Thanks!