You're not going for quick and easy are you, Mason. 
It does not require any real effort, just drying time for the wash, and a little drybrushing.
I think the end result is worth it, though.
@Mason
Do you have any photos of projects which demonstrates this method?
I do not have any handy pics that show this to full effect for a nice clean lawn, but I have found a pic showing the process up to the level of the first drybrush after the 'dirty water' wash.
(The wash is used as I find static grass is too shiney and unnatural looking).
This drybrush was of a more 'wheat' colour, as I wanted to give the impression of an untended graveyard.


A brighter, 'fresher' choice of greens for the drybrush would give a cleaner appearance and would be more appropriate for a lawn.
You can see that I have left some of the 'earth' underneath exposed.
For a lawn, you would obviously not leave this exposed, but it does show what it would look like if the grass was to be rubbed off during use.
Hope that this is of some help...