Bryan,
I did the same to my '06 Ben 343 a couple years ago; sanded until most of the roughness was gone, treated with teak cleaner, and applied Semco natural & then clear. Looked almost as good as yours! This year I decided to retreat it and simply washed it thoroughly with simple green and soft brush across the grain, dried thoroughly, and recoated with Semco natural and clear. It looks OK; however, I didn't get that nice teak color again like you have. Guess that I should have treated with a one part teak cleaner before recoating. I am trying not to get too aggressive with multiple teak treatments and multiple sandings; however, I guess that's the only way to get the teak color back again. When I have to recoat it again in few months, guess that I will go thru the entire process again. I do like the Semco, very easy to apply. Nice job; looks great!