This is one of my first 3 customs I was making at the same time. I was inspired to start customizing after seeing everyone's great work.
Pretty basic: I used a quicksilver figure. I shaved off his hair with a dremel and scultped new hair. I shaved down his joints and shoulders to help prevent paint rub which was a big issue.
I confess the paint I use is cheap and hard to work with so I could have done better.