I had the same issue as David Paul. Bought a box of six cans when I started building my -10 and ended up throwing it away because it was so frustrating trying to get the cans to spray.
I don’t think I’ve ever made it to the bottom of a can of that stuff.
My hanger neighbor came by looking for some yesterday. A quick search of places that I could think of revealed nothing. Most reporting a 2 to 3 month backorder.
I’ve had good success with the MarPro Zinc Chromate Primer and the Moeller Zinc Phosphate primer, both are in stock and available on Amazon. These products are marketed for the marine industry and can readily be found at marine supply places as well.