@roger,
Forearms and ankles skin, I suggest you use natural oils which are best for your skin problem like you can use Coconut oil, Olive Oil, Sunflower seed, oil, Shea butter Oil, Jojoba Oil. These all are mainly used for Dry skin, Smooth and Radiant skin, oily skin, combination skin(Dry & Oily Both). So, I think those are must be useful for your problem.