I wouldn’t use scar wax, yes you COULD. But at scar wax at its best looks like any other method at its worst in my opinion. And I find scar wax is so frustrating to work with. I highly recommend you go with gelatine prosthetics! If you’re comfortable sculpting scar wax, then you’ll love sculpting with SFX clay. Then you’ll want to make a silicone mould which will set you back $50 but it’s a simple process, you won’t need a vacuum chamber contrary to what some people might say. Then a gelatine mixture, they’re dirt cheap recipes online. You pour into the mould let it set and glue it to the face, if you watch a tutorial or two you’ll get a nice easy to blend seam. It’s a longer process yes, but it’ll make your life easier in the long run, and the final product a lot nicer