I used Cetol on my boats. The key to a result that looks as good as varnish, though won't have as high gloss, is prep and a annual maintenance. If you don't have place out of the sun, apply it late in the afternoon on a day when humidity is low.
The first application is the only one that's heavily labor intensive...'cuz prepping for it needs to be the same as prepping for varnish: CLEAN wood that's sanded as smooth as a baby's cheek. Never use a wire brush on teak, btw.
The first application should be 3 coats spaced according to directions. LIGHTLY "sand" after each coat is dry using fine bronze wool to remove any dust or whatever may have attached itself. After the 3rd coat, you can apply a clear gloss coat if you want it shiny...I always preferred the low gloss.
Every spring afterward, lightly "sand"--again using fine bronze wool--to remove scuff marks, scratches etc and apply at least one more coat. If you need a second coat, lightly "sand" the first one with fine bronze wool before applying.
If you do it this way, you'll never have to strip start over again...one or two new coats every spring will keep it looking like the first year. Ok "never" is a long time, but I can tell you that it was still gorgeous after 8 years when I sold the boat.
--Peggie