modifying unique figure

Posted in Custom Workstation

hey everyone! I was considering doing a custom using the 5" tomy ash ketchum figure as a base. any suggestions on modifying his clothes? I'm trying to make it so he has shorts and a long sleeve shirt. I'm guessing if I'm good at it, I could just sand down his legs, but any ideas for the arms? do you think it would work if I used apoxie sculpt over the arms? I'm really trying to keep this as the base figure, so any tips? thanks!