Beautiful teak job!
If you want to do that work less often, I suggest at least several coats of Cetol (I think that is a Sikkens product) or the West Marine version of it. It may slightly shift the color but, man, does it ever protect the finish from the sun and elements. Cleans easily, does not attract dust like oiled wood, much better than varnish. When, usually several years later, it begins to wear, a light sanding and reapplication will do the job. Can you tell, I'm a fan.
(My teak is down to two little step pieces that lazy I now leave UNfinished and scrub with detergent when the mood strikes)
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD