I do a maintenance coat of Epiphanes once a year. Rub the teak down with fine steel wool and then a tack rag and add another coat of Epiphanes.
The think the Sikken's will last longer. I believe the Sikken's goes on thinner and requires more coats.
After the first cleaning etc the swim platform needs to oil down about 4 times during the summer. Luckily Karen has taken that task. I get to supervise with a ....
I do the maintenance coat during the winter months. Gives me something to do besides sit in front of the woodstove dreaming of warmer weather.