When you wash the surface then layout your track you shouldn't have any problems with what solution you spray. Whether it is grape soda, grape snowcone syrup, pancake syrup and water, or sugar water. They all give you good results as long as you don't over spray. Grape is the preferance by most because it has more sugar. Others have tried root beer and orange soda also.
When you vacuum or blow off a surface it is harder to get the perfect results every time. That's why it is better to wash a surface but harder work. I see noone mentioned the quick fix for dusty sections of a track. When you have a track that hasn't been washed you can spray a mist of WD40. Yes the same WD40 used as a lubricant. In sections where the tracks is dusty, spray abit of WD40 to help settle the dust deeper into the asphalt. It is easier than trying to remove it without washing. Then you can spray your traction mixture on the rest of the track.
What ever method you use make sure you allow enough drying time before cars run on the track. Racers tend to put their cars on the track before it dries and that makes it worse for everyone. It removes the spray from the ground and is picked up by the tires.
Good luck and I hope this helps you with your goal.