Quoting Sean-Michael Grifin
very nice job the sharpie looks really neat and sloppy(in a good battle damaged way)
Its not good to use sharpie on minifigs(my personal preference) because it rubs off very easily. I use acrylic paint, so it stays there for good, then I take podgey(that glue that is used to give things a shine) and put it all over where I painted it so its shiny, and smooth.