use Cetol on NOTHING you want to stand on, unless you have a rubberized azz.
You're going to get 47 opinions on what finish to use, then 59 opinions on how to apply each of those finishes.
For teak you're going to stand on, its my opinion to use teak oil liberally. Or, nothing at all. it'll wear to a light gray patina. (less the dirt and gunk)
For reflective, mirror, looking up the dress shine, there are a myriad of finishes that will work. (including Cetol)
We are not primarily on earth to see through one another, but to see one another through
Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs