Meguiars Ultimate Compound, rub it on with a foam applicator or a microfiber cloth, then wipe, it will remove all your swirls without taking lots and lots of paint away.
That or the less abrasive Meguiars Scratch X, but sometimes I find that needs 2-3 applications before you see any results. which is good really, the less paint you remove the better.
Nothing is as aggressive as T-Cut though, my god, lol, takes your paint off.