Ultra Fine Sharpies are an excellent tool for customizing, as they allow to do produce fine details without the mess of paint. The narrowed tip delivers extreme control and accuracy. These are extremely versatile, and can write on almost any surface. Sharpies are waterproof and smearproof. They features a quick drying, certified AP nontoxic formula.
Luke uses these type of Sharpies in his custom work on a daily basis, such as the details on Zombie Magneto: