I drove it when I was 16 and then was passed down to me when I graduated high school. It had yellow at the bottom. But when I turned 18, I started to detail yachts and I had access to a badass buffer. I used it on my 300 and booyyyy it was so bright white and just shining you wouldnt be able to stop looking at it (I wish i still had that buffer). It wasnt one of those 100$ cheap buffers either...
A buff is definetly needed to get these stains out.