Sunscreen is one of the most useful tools to fight against signs of ageing, but this needs to be applied to more than just your face and body. An expert said it is important to put it on your hands, especially when getting your nails done. Skin Cancer Organisation said: “To play it safe with gel manicures, the Skin Cancer Foundation recommends applying a broad spectrum (UVA/UVB) sunscreen to hands 20 minutes before your hands are exposed to UV light. “However, even this precaution does not protect against subungual (under the nail) squamous cell carcinoma, a rare but potentially aggressive for…