Just as with the gunwales, we felt that it was time to refinish the cabin tops. To begin, three persons scraped for two days.
We then used a oxalic acid (and later some juju with baking powder/natron) to further leech and lighten the wood. Followed by a (long) round of sanding, until the cover was silky smooth.
Next step: a warm stain and seven coats of varnish (AksoNobel Alllwood). The end result is beautiful.