On our last boat, the Channel 31, there was very little teak; handrails, washboards and a cockpit kick board. On the Mystery 35 (still not launched) we have a teak toe rail, handrails are the same, in the cockpit area the cockpit coaming/cockpit seats are again in my favourite wood. For pure indulgence we have gone for a laminated teak tiller and for pre dinner G & T's/after dinner coffee and port(s) in the cockpit, a Lagun versatile teak table. The beauty of this table, apart from its looks, is that it is fully adjustable, has no legs to get in the way and it can be folded and packed away! Maybe the next boat (highly unlikely according to Jenny) will have teak decks. I like to see the golden brown of 'new teak' yet one of our good customers who has a Najad 373 swears by the silver grey look! If you are of the latter persuasion, very little maintenance is required.
If you're sailing in a hot climate or on a very sunny day it is recommended that you wash the deck down in the morning with water, preferably seawater, before it gets too hot, then repeat again in the late afternoon. In the autumn when the boat is being laid up, the use of Wet & Forget will keep the green look away (great also for glassfibre and canvas work). If the rubber caulking is starting to protrude above the planking, sand flat but only along and not across the seam. If you don't keep an eye on any that is proud there is a danger that you or a crew member's foot can roll it out of the seam!
If you like the look of slightly weathered teak our boatyard guy uses Teak Wonder Cleaner if the skipper wants to refresh the wood. It's easy to apply and use, no hard scrubbing, just brush onto a wet deck until clean and then wash off. If a lighter new look is required, Teak Wonder Brightener is then applied, once again to a wet deck. The teak will lighten almost instantaneously. To keep the teak looking like new, once the deck is bone dry an application of Teak Wonder Dressing and Sealer is the answer. Me I have used with great success the Onward Trading Companies Teak Cleaner & Renovator both on boats and on our garden furniture.
To get into those awkward places, the Shurhold Detailing brush, which has of course stainless bristles, is an excellent bit of kit to carry on board. Shurhold ultra fine bronze woolis also a great product for use on teak and other marine wood, and can be used for polishing metal. Excellent for bringing back the shine to your stainless cooker hob, glass and can even be used to clean solar panels.