I am looking for info on refinishing the Teakwood on my pleasureboat.

Depends what finish - if varnish, then strip off all the old stuff.
Give it a precautionary wipe with white spirit, or better still
acetone to degrease/desoil the teak. Then put on 5 coats of a pure
Tung oil varnish - such as Le Tonkinois and Jotun do one - not a
normal International/boat/marine varnish that always has a thinner in
it. That will last a good 5 years.