Bill, I'm pretty sure there are Sherwin-Williams Industrial stores in California, because there are Polane blends that are made specifically for the stricter California VOC requirements.
It's confusing trying to find a Sherwin-Williams Industrial store -- Sherwin-Williams Industrial & Marine Coatings is a completely separate subsidiary of Sherwin-Williams, with a completely different product line. To make matters worse, the Sherwin-Williams consumer stores sell "Industrial Enamel", which is good, but not nearly as durable as the two-part epoxies like Polane.
I can never find the number of the SW Industrial store in Austin, so I just open the Yellow Pages, call a random Sherwin-Williams store, and ask if they sell Polane. If they don't, they'll immediately tell you "You need to call the industrial store at xxx-yyyy."
The other way to tell if it's a Sherwin-Williams Industrial store: when you go inside, it has plain floors and concrete walls, and a bunch of professional painters waiting for large quantities of paint.
If the Sherwin-Williams store has nice floors and paint chip displays, and Soccer Moms looking through color samples, you're in a retail store