Honey Teak
If you value your time and the beauty of varnished teak. Consider one of the 'modern' catalized two part + two part urethane/acrylics. I switched to a product called "honey teak' (www.signature finish.com) about six years ago for a large 'teaky'. This looks like an amber oilbased varnish, can be fully coated in one or two days, ... maintenance only requires scuffing with a scotchbrite pad / plus a quick clear coat yearly. With only minor repairs I'm now going into my 6th season. On the West coast, most use a product called :"Smith & Co. 5 yr. Clear". Put on three base coats of Honey teak and three of clear and then you only need to recoat every two years. I power-buff the HT in alternate years. You can also hand-rub these with rotten stone and water to develop the irridescent patina of the wood underneath and to produce a gloss that you only see on mega-yachts. (I use an airbrush on the final coat -- but Im a fanatic). Both of these last longer than Bristol, Armada, Cetol, oil/urethane varnish combinations plus overcoating with 2part urethane clear,etc. They do not LIFT and are easily repairable. You apply them with a soft artists brush. They are expensive; but, when you amorrtize your time and cost of constant on/off with all the others ... such initial cost sure makes sense in the long run.