02-16-2012, 09:37 AM
For what it's worth, I have attempted a felt roof with chippings by brushing on mid to pale matt grey paint and then immediately sprinkling a copious amount of white pepper. press well into the paint (trying not to sneeze), and then wait until thoroughly dry. Collect surplus pepper and then give quite a firm brushing with a small flat bristle artists brush to get any remaining loose pepper off the surface. See below.
