Woochie Scar Set Latex Prosthetic is a staple for horror enthusiasts and professional SFX artists.
 
The set includes three pre-painted latex pieces that looks like keloid scarring
Made from thin, flesh-colored latex that blends  with skin. Already coloured, but can be overpainted with facepaints or makeup
Apply using Spirit Gum or Liquid Latex (sold separately).  Add fake blood for a more gruesome appearance.