So I've just washed my 2015 and have noticed a gritty feeling across the lower half of the paint compared to the smooth roof. Obviously this is from the road and it's hard to see but I don't like that it's there. Here's the deal. I don't have a buffer, I don't have any experience with waxes or clay bars. And I don't have 2-3 hours in a day to devote to doing it the BEST way with 2 toddlers and a baby. So what would be the best way to get that grit out and have it be smooth again?