Sharon McEfee has been working as an esthetician in San Diego since 1984 and now runs her independent skin care practice as a certified G.M. Collin salon — a Quebec-based medical-grade skincare line that requires ongoing practitioner certification for protocol-based treatments — with International Dermal Institute training behind the menu. The core services center on custom facial therapies, microdermabrasion, waxing, and eyelash and eyebrow tinting, with anti-aging exfoliation protocols tuned to each client's skin type rather than a fixed treatment sheet, which sets a different service depth than the short-menu boutique model at Beauty By Victoria. The G.M. Collin certification includes access to the line's clinical peels and anti-aging ampoule serums, treatments that aren't typically stocked at general day spas. Long-tenure independent practitioners tend to run with a different booking rhythm than full-menu destinations such as Therapie Day Spa, where massage and facial cross-booking drives higher same-day volume. The most involved protocols here combine a series of progressive exfoliation treatments — microdermabrasion layered with enzyme work — scheduled across several weeks to address pigmentation and sun damage accumulated from beach-proximity living along the Sunset Cliffs and Dog Beach corridor.