For grins and giggles I will throw this in...I recently purchased a soda blasting kit from "Water Cannon" and it works great. This hooks up to your high pressure power washer and sucks up the soda from the soda bag. The only drawback I found was that it killed the crap out of some types of grass in the yard so I moved my project down to the south forty and it worked great!
Just a thought ....
Just a thought ....