We strongly advise you to not attempt to alter your composition doll's visage, but if you do, then the only thing you should use is acrylic paint. This type of paint won't dry out the surface, but it will conceal some of the crazing and cracks that are bound to have happened to your doll by now. Plus, it will add a little shine to your doll's complexion. Be sure to find a paint color that closely matches your doll's skin tone, and apply it with a soft, cotton rag in very small patches. Rub it on and then buff it off before it dries, being careful to avoid the entire eye area including the brows and lashes.