You shouldn't have too many problems with white. The weather conditions may be the most important aspect to spraying it. Not too windy and of course not in the direct sun. Cut it with Flotrol and have at least two guys spraying next to each others(one gun or two guns). One is always spraying while the other is leap frogging around him. Dont spray too much at a time, keep over the ladder, about 6-8 feet high at a time and keep working across. Got too hustle. When you get to about 25-30 feet dump the ladders and get a 20ft extension pole for your gun and finish it up.