Some water, even softened, can let a ring of deposits form at the water line. This ring does not remove with chemicals including muriatic acid. So mechanical means are needed. To resist deposits, car wax has been suggested. My question is, what product and method would be best (effective and durable) for this use inside the dry freshly-cleaned porcelain bowl, particularly at the water line?
This post mentions waxing inside the bowl, but it did not get into what the best thing would be. https://bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4179429/Searchpage/1/Main/256398/Words/toilet/Search/true/Re:_Turtle_wax_VS_NuFinish#Post4179429
This post mentions waxing inside the bowl, but it did not get into what the best thing would be. https://bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4179429/Searchpage/1/Main/256398/Words/toilet/Search/true/Re:_Turtle_wax_VS_NuFinish#Post4179429