1) Lay down a generous base of Vaseline.
2) Cut out a piece of Saran Wrap in the general shape of the moulage area and lay it on the Vaseline.
3) Smooth out the Saran Wrap. I doesn't need to be perfect.
4) Dig out a piece of Nose & Scar Wax and mold it to the shape of the moulage area. It shouldn't be much more than 1/8" thick.
5) Smooth and shape the wax over the moulage area.
6) A little vaseline on your finger will help to smooth out the wax. Try to get it as smooth as possible, but don't sweat the small stuff. The edges are the most important.
7) You can use a little makeup to blend the colors, but this will be masked later.
7b) I forgot to take a photo, but prior to making the laceration, add a little red creme makeup from the Ben Nye 3D Effects kit to cause some erythema. Don't worry about small inconsistencies.
8) Make the laceration with the BACK of a knife blade. Twist the blade slightly as you make the cut to cause the would to gape slightly.
9) Sorry for the poor photo quality. I'm having issues with my camera. This is about what the wound should look like. As you can see, there are inconsistencies in the makeup that will be hidden.
10) Spread some Ben Nye Thick Blood in the bottom of the wound. Spread it slightly up the sides of the wound.
11) Wound with thick blood should look like this.
12) Add some Stage Blood to the wound, filling the canal.
13) With a paper towel or Kleenex, dab the blood around the wound. This will hide any inconsistencies and add some more realism.
14) Add a little more Stage Blood to cause a drip and Voila! The stage Blood will actually dry and harden, yet still look wet.
15) Lift the wound off. If you're careful and have a place to store it, you can reuse this wound a couple of times.
16) Wound removed.
17) Wipe off the Vaseline and any loose products.
18) Gently and carefully scrape the dried Stage Blood away.
19) Good as new!
Originally posted by Jimmy Rowland on SSiH Tricks of the Trade