Left side: When all the markings are done, start with the lighter colour which in this case is orange. There are many eye designs of Deathstroke's mask so go for the one you like most. Although you may need to do this later again, it gives a much better idea of what to do. When the primer feels even after 1 or 2 coats, get a pencil and mark the eye and the midsection.
If the white colouring still shows anything from underneath, coat again. To get even colouring, first paint it white as primer and let it dry.
