welcome, chrisn is right, not to mention out of all the colors, white seems to be the most noticeable when it comes to overspray, even masking off and throwing down drops, it would only take a good wind to leave a ghost pattern on the ground once your drops are picked up.
white covers horribly, even though you may ask the paint store to throw in extra titanium in each gallon, i can still see you doing it twice which isn't a problem at all with a roller, the thing i see is the reveal which is not the widest part nor the facing trim, but that little half inch part that turns back and meets the greyish blue color, with that i would use a whizzer skin or something similar to and a spray shield or a single strip of tape...good luck