In my master bathroom we have a kholer tub mounted on a platform
surfaced with teak. The teak is about 20 years old and has been
cleaned and oiled on occasion but the teak shows some dark spots and
perhaps stains. I now would like to bring its appearence back to as
good as possible. Short of using teak cleaner for boats (because I
cannot do the water flushes as required) can anyone recommend what
process I should/could use to obtain perhaps the best results?

TIA