After looking at the crappy condition (swirl marks) of the blue gelcoat (condition it was delivered in) on our M, I finally got it looking decent.
Last year I used a straight wax on the boat with a DA polisher. Did nothing for the swirl marks.
This year I tried a few other, more agressive products. I ended up using the 3M gelcoat restorer (gritty compound) that I used on our 12 year old faded powerboat to bring out the shine. Used it on the Mac, using the DA polisher. Stunning results. I really hated to use something as agressive, but it was the only thing that worked. It got 99% of them out, and significanly reduced the few remaining marks.
Anyhoo..here is a pic after the wax job (note the reflection). The blue really kicks @ss. Now it is covered in green pollen, hope some of the rain washes it away.



Paul

