Everything red Goober said is great .
Coredump - swirls are EASILY fixed with teh right product , know how and the right pad(s) and TIME and patience !
Yoder - that product you mentioned is EXCELLENT actually . It is for paint jobs that do not need repair though , although it CAN fill swirls ( maybe two applications ) I would repair swirls , then use it .
A good washing of car with Dawn to remove all grease and dirt , a tar/bug remover ( clear coat safe ) if tar/bugs are present , then a good claying where needed 1st .
Then a good wash with 100% cotton terry ( egyptian cotton ) towels- keep the edges off when washing/wiping off wax / polish .
Swirls can be removed after this with teh right product , store bought Meguiars' and Mothers both make decent product .
3m Makes a version seperate for light cars / dark cars ( red is considered dark ) that works REALLY well by hand or buffer .

K next reply I make will be removing swirls thread / post after clay/bug&tar & Dawn Wash is done .