The Magic eraser is equivalent to approximately 1500 grit sandpaper. There's no magic about em. You're wet sanding the stain away. Just be careful when you use them on gel coat. They have their place but one has to be aware of their abrasive properties and not use them everywhere all the time.Teak oil on gel coat comes off very easily with those Mr. Clean magic sponges. So do gray drip stains. They are fabulous on stainless tubing.
some teak oils have more polymers in them than others ...depending what you want in a finish ...i do know that watco has a heavy amount of polymers and makes a nice finish inside the cabin but not sure for the outside just yetI used teak oil on my previous boat, and was very happy with it on the Great Lakes, and used to recoat about every 6 months.
Now that I am in Naples, I wonder if there is a down side to teak oil, versus just leaving my teak natural, as it is now. A local marine wood refinisher told me that teak oil doesn't work well in the Florida environment, something about it absorbs or traps the moisture.
Any thoughts?