Also the Meguiars products simply fill n' hide swirls so they appear not to be there
It's kind of half-arse'ing doing that , but if you want to fix them " permanently "( remove them ) and dont know their cause , you will need an orbital polisher and the know how to do it , only need a good cleaning twice a year and filling and hiding them , but they could be removed as well .
If its a cheap car , cheap paint or you need to sell it ( and be decieptful to an extent ) by hiding swirls or don't want to risk ruining your paint from lack of knowledge - I suppose go for it .