“There is no such thing as perfect skin. Let’s just get that out the way,” says aesthetician Shane Cooper, who, from his South Kensington clinic, tends to the complexions of Maya Jama, Sienna Miller and Dan Levy, among others. I am here for facial microneedling to improve the appearance of acne scarring. “It creates controlled micro-injuries in the skin,” Cooper explains, “which stimulate the natural production of collagen and elastin. This helps remodel scar tissue and smooth…