Is there a plain wallcovering I can to cover up rough walls or even cinder blocks?
There are many different liner papers on the market today which can handle rough walls, stucco walls, or walls that have been coated with “knockdown” finishes. These liners range from the wall resurfacing types to lightweight underlayments for slightly rough walls. A professional paper hanger can advise you on which type of wallliner is right for your walls. It also doesn’t hurt to test hang a small section of wall with the proposed liner paper and on top of that the proposed pattern paper hung and allowed to dry.