The white “speckles” you see are special cells called lithocysts, a type of cell in the epidermis of certain plant leaves; these are normal in Ficus species. The red/yellow spots at the leaf tip (although difficult to tell from photos) could be a disease symptom, possibly cercospora leaf spot, caused by a cercospora fungus. Avoid overhead watering of plants to minimize wet foliage and avoid spreading the disease. Water the soil only. You can wipe non-infected leaves with a clean cloth to keep them free of dust, but don’t put water on the leaves. Provide good air circulation in the canopy (among the leaves); you may want to thin them out just a little. Carefully dispose of infected leaves and/or fallen foliage to keep the fungus from spreading.