You will open a can of worms.talk to paint Rep.at any paint supplier fo proper procedure.

you first prime with a product designed for that (don't recall the name) and patch all the seams. I might have to do this too because I have a room with wallpaper that shows no signs of being removable. You can't just paint directly over the wallpaper, though.

you'll regret it if not in the very near future but for sure somewhere down the road. Think about it - paint over wallpaper creates a water/vapor barrier, so it's going to lift like a blister.There's products to spray on wallpaper which makes them easy to peel, but a rental steamer can be had for the stubborn wallpaper. Messy, but necessary.

Don't do it.

Removing old wallpaper is not easy but worth the time and effort.
You will regret painting over wallpaper, the seams will show and perhaps the moisture in the bathroom will get behind the paint and cause the whole thing to blister.

Get an old spray bottle, spray the walls with a combination of hot water and vinegar.
Before spraying, gently score the walls so that the sprayed solution will get behind the paper.
Scrape off after several sprayings. Be patient. The solution will take some time to soak in.

Use a razor blade(gently) or wallpaper scraper to do the job. Even an old putty knife might work.
Smooth out the dry plaster by sanding, then prime and paint.

If it is wallpaper over sheetrock, the job is tough. I'd remove what I could, knowing that I would damage the paper covering the sheetrock. Allow to dry and plaster over with joint compound, then sand, prime, paint.
Good luck.

I asked first. Hugs.

after 5 years it's still good.

here's how i did it


got a primer that was designed to adhere from Sherwin Wms http://www.sherwin-williams.com/homeowners/products/catalog/multipurpose-primer/?referringCategory=interior-paint-coatings/primers/

mixed it 50/50 with premixed drywall 'mud' and went over the walls with a 3" roller putting on a good heavy coat which gave me a nice 'orange peel' finish

let it dry well and painted as usual.

YMMV and a stick home wallpaper is different than the mobile home vinyl walls but it may be worth a try.

lord what a mess!

after that experiment i looked for an alternative which lead me to the 'paint & seal in one easy step'