Wow, thanks for the great feedback, guys!
I honestly have no idea what you are talking about when you say geotextiles. As for irrigation, no, there is no irrigation in these rock beds. However, they are on a grade and would run off onto a (kind of) grassy area below, and then into a drainage reservoir. I didn't consider runoff as it doesn't rain much here, but then again we got about 4" in the past week! And the last thing I need is the TCEQ all over me about contamination into the reservoir.
I will definitely look into the other products you mentioned. I was hoping to not have to reapply so often, but if that's what we gotta do, that's what we gotta do.
1999 Ford F-250 SD 7.3L Crew Cab 270,xxx miles
5x10' trailer w/gate and racks
2006 Great Dane Surfer 19/52
2008 Hustler FasTrak Mini 17/36
26" eXmark Metro
2010 & 2011 Honda HRC216HXA
Billy Goat Yard Vacuum
John Deere T105S LE
Stihl HS45 Hedge Trimmer
Ryan LA28 Aerator