Personally,I have had good results using Meguiars M67 on a DA using a foam cut pad
Also a Rotary with a wool pad does well
The M67 has good correction and actually finishes out pretty good
If you only have minor swirls you could go with M49.
I follow up with Meguiars Flagship Wax
These Marine polishes have more oils to keep them from drying up so fast .
M105 will dry out fast on gelcoat.