Well, it didn't go so well. Started with an orange pad and 3 or 4 passes later...nothing. The scuffs and light scratches were still there.
I stepped up to a yellow pad, and again 5 or 6 passes. The IP started to dry so I stopped and wiped it down to check my work. What I saw was not a glassy finish, but what looked like it could have passed as remnants from a bird bomb (on an regular car finish). It is still smooth, but the reflectiveness from a light gives it a patterned pitted look. You can only see it in the reflection, but I couldn't feel it. At least I didn't think I could. Sorry I don't have pictures. I may try wet sanding it lightly with some 2000 and give it another pass with FP II or IP by hand.
The boat is 4 years old and has been stored indoors inside at least the last 2 or 3 years.
I was using a Shurhold DA......puzzling.