You can applique fabric for the markings on the shorts (with a finished satin stitch around all edges would be best), and embroider the handkerchief he wears on his head with gold embroidery thread if you are feeling really ambitious. Paint can be done really well and look really nice, but if you want to go the extra mile, that would be my recommendations. Good luck on your Serge! I absolutely adore Chrono Trigger and Cross and am working on a Harle myself right now. If you have any more questions don't hesitate to ask.