[BMM]

Hello! I thought I'd be nice and polish my parents Black 2007 Impala. I used a Makita polisher on it's slowest speed, started with Farecla g3 and their white foam pad. I kept it wet, and went very quickly with the G3. I wiped it off, then did the entire thing with G10, again with their black glazing pad, keeping it wet. Once I was done, I buffed it out and it looked great.

Now, a few days later when the sun is out, its got some major swirl marks. And before I try to fix it, Im curious as to what went wrong. Did I not do enough G10 after the G3? Or should I use something in between the G10 and G3? Or what, I dont know. I havent had this problem with any other paint I've polished, but this IS my first time polishing black.