Right on. Let me know what you decide to use and how it goes for sure. Use a mold release this time too. You can buy it in spray cans, but I’ve heard some people using cooking spray like Pam. You spray a thin coat over your mold before you cast. Since the silicone won’t stick to oil, and the oil doesn’t stick to the mold, it pops right out. Though there are some compounds I hear that require a special release agent. Liquid car wax, Vaseline, WD-40 are a few others some people use. I say do a test, mix up a small amount, apply to a coated piece of scrap. See what peels off easy and what doesn’t.