Swirls are from the grime/dirt that you can't get rid of by just washing and then waxing it. About using dawn, idk but I've heard it's bad not to dog on it but it's for dishes and that's why there's car wash soap. Look at the meguiars videos on YouTube, they are very informative and how to use the products. All I use is meguiars products. Also look up the two bucket wash system, helps preventing future swirls on your car. Btw I've never tried layering two types of waxes, good luck.
---------- Post added at 09:31 AM ---------- Previous post was at 09:26 AM ----------
Also I would clay bar it, you should clay bar it even if it was brand new from the dealer. Debris/grime/dirt and everything else collects on it as it just sits there. Better safe then sorry. I would definitely clay bar it after 2 yrs, you should be able to feel it after you wash your car. Place your hand in a zip lock bag and rub your car lightly and if it doesn't feel like glass, clay bar for sure.