from The Century Dictionary.
- noun Wall-decoration executed by laying on the face of a building, or the like, a coat of colored plaster, and covering it with a coat of white plaster, which is then scratched through in any design, so that the colored ground appears; graffito decoration.
from the GNU version of the Collaborative International Dictionary of English.
- noun See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The first
layerof plasterto be applied in plasterwork.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Under his fingertips Joanna glimpsed the scratchwork shadows of traced Sigils and runes.
For instance, you need to fine-tune your Process of Elimination technique or Fit-in-good-numbers technique since you will have far less time given the fact that the question is on the screen and the scratchwork is done on a rough paper, which would require you to re-write some parts of the question.
He did collages too, and scratchwork (not that any of these techniques are or were mutually exclusive), but I find his paint-heavy works to be his finest.