What is the process of removing excess wet colour with a clean damp brush called?

Correct answer: Colour lifting

The governing technique is colour lifting, in which a clean, slightly damp brush absorbs or removes unwanted wet paint and makes the area lighter. The brush must be cleaned and blotted repeatedly so that it does not spread the colour elsewhere. Outlining makes edges, stamping transfers marks, and scumbling lays broken colour rather than removing it.