Tokay seem to have the best magic for healing. Like most Gekko that can regenerate a full tail, cuts and deep bites will heal very fast if the animal is not overly stressed. Scare tissue looks black.
I get imports in all the time that I photograph and describe any scares that they may have. After the next shed, the scar is usually hard to find. Even very big ones disappear completely in 90 to 120 days. It's unbelievable.
Good luck,
Michael