In this technique the topcoat, or glaze, is patterned by gently placing & removing crumpled lining paper over the surface.
Where the paper makes contact, the glaze is lifted revealing the base coat.
It is advisable to get someone else to paint the wall with the mixed glaze ahead of you, so that you can concentrate on creating the effect
If you must work alone, paint small sections, 3ft (1 metre) at a time, & stop the frottage process 6 inches (150mm) short of the leading edge.
Before you begin, cut several 2' 6" (1 metre) lengths of lining paper off the roll
To avoid the possibility of print being transferred to the wall, do not use newspaper (as suggested by other websites).
Crumple the pre-cut lengths of paper, and then open out, making sure there are lots of creases and folds.
Apply the mixed glaze evenly with a brush or roller.
Place the crumpled paper onto the surface of the glaze, flatten it gently with the back of your hand and carefully peel it back off.
Move to the next section of wet glaze and repeat.
Any missed areas may be patched in with small pieces of paper torn from the roll
The challenge of frottage is to smooth the paper evenly over the surface without twisting or sliding it in the glaze.
Repeat the process over the area to be decorated, lapping-in on wet edges.
Allow the first wall to dry before starting another to prevent spoiling the finished effect.