You working by hand?
It looks Naples from your avatar?
Working by hand, its going to take some elbow grease to rermove the swirls, best bet is to try some Meguiars Scatch X and a folded Terry Towel to add some more bite. Will take some time and effort to do a car though.
Follow that up with a good polish, sealant and then maybe some wax if you are feeling like going the whole hog.
I would try, Autoglym Super Resin, seal with there Extra Gloss, and a good carnuba wax after like P21s.
Look into a good wash mitt or pad rather than a sponge, to help stop swirl marks.