If it is teak, then it just needs to be cleaned & sanded then sealed with Semco, if you want to use the same sealer. Below is a photo of a 2018 Tayana 48 with treated toe rail.I am looking to treat it. The cockpit floor and seats are teak and I treated them with Semco sealer they look good. But the toe rail looks a bit differently, not typical teak grain.