Vall I couldn't get the link to work. I looked it up myself from your description. Pretty interesting. all of a sudden your link works now. But anyway that ospho seems to work real well. I never used anything like that before. Somehow water and bare metal makes me very nervous.
I don't have tons of paint experience, but I've been a bit leery of all the new water based paints. But it seems to me that's the direction were headed towards. Someday soon we wont be able to buy anything that's not water based.