I've experimented with Powdered Graphite and Water Soluble Graphite. Here is a demo video of the paintable graphite.
Some Recent Work Skating at the Edge of Infinity
Powdered Graphite Under Watercolors - Belinda Del Pesco
Colored Pencil Portrait on Black Paper - Belinda Del Pesco
Art Graf Water Soluble Graphite Powder 250g Bag, Gray
Antique Metal Candlestick Burning Candle Stock Photo 49121026 Shutterstock
Water Soluble Graphite - Review of ArtGraf - erasable graphite painted on paper
Water Soluble Graphite demo video - Little Jay - Belinda Del Pesco
Review: Viarco Art Graf Water Soluble, Kneadable Graphite Putty
Powdered Graphite and Water Soluble Graphite for Drawing and Painting - Belinda Del Pesco
Still life with Artgraf water soluble graphite
Powdered Graphite and Water Soluble Graphite for Drawing and Painting - Belinda Del Pesco
TRYING ART GRAF GRAPHITE PUTTY (KNEADABLE, WATER SOLUBLE, AND MESSY!)
Antique Metal Candlestick Burning Candle Stock Photo 49121026 Shutterstock