Absolutely. It generally has a thick texture and is great for covering up an imperfect wall. It's available at Lowe's and other home improvement stores.
any wallpaper can be painted.the key is priming before you paint. you must use a primer that is either shellac or oil based-latex primers are no good on wallpaper.once your primer dries you can use any latex or oil based paint.
It isn't a good idea. First you should try to remove a wallpaper with warm water, you can use a steamer. If you cant remove you can paint with very good quality paint like a Gardz.
Yes, we have a wallpaper called Patent Decor manufactured by Marburg, it is designed to be painted. It comes in over 120 different textures, you can view the range at our website, search for hume internationale