My boat is only a year old but I use it a lot so the teak on the swimstep was looking really bad. I had tried oiling it but the oil wouldn't take so it was time to refinish it. Step one was sanding using 80 grit paper on a random orbit sander, followed by a 1-step teak cleaner. After rinsing the cleaner off and letting it dry, it was time for oil. Three coats of oil and it's looking pretty good. Here are the before and after pics.