I’m developing a transparent, leave-on gel that lays down an invisible, breathable film, keeps sebum in check, and doubles as a makeup-friendly base on targeted areas such as the nose and cheeks. The texture I’m after is decidedly lightweight and watery nothing thick, pasty, or creamy, I want to be thin and it should settle to a natural, skin-like finish rather than overtly matte or dewy. Core actives must include niacinamide and a zinc source; beyond that I’m open to your suggestions on film formers, humectants, or mild preservatives that play well with combination skin. Please avoid any ingredients that commonly trigger sensitivity or pilling when layered under foundation. Because this is a low-budget, proof-of-concept run, I only need 1–2 small prototypes for personal wear-testing. Ideally you can: • Deliver the finished samples (15–30 g each) along with a concise formula sheet showing percentages and INCI names. • Outline the simple bench-top method you used so I can replicate it later. • Flag any stability or pH considerations I should watch over the first four weeks. Let me know if this scope is realistic for you, a rough turnaround time, and your estimated price range so I can plan the next steps.