Stripping Old Papers
Old papers should be stripped off. Provided that the old paper is quite firmly affixed, it is possible to paper over it, but this course is not advisable for three reasons.
One is that, although the old paper may appear fast, it may loosen when the paste of the new paper moistens it. Another is that, if new paper is applied over old, the joints of the underneath paper may show through. And, lastly, it is best