Pete,
Which office does Scott work at. Got some info on the epoxy I was gonna use, and have decided to go the route you describe bridging the pond coat and sealing the glass before coating the tank, and how much are you paying per gallon. Permidri is near me in cali, and thinking I should just order from them. Plus the Wife and I could make it a long weekend and just go pick it up to save shipping, and visit her sister in the process.
Dont know where you find time to build new tanks with all the established ones.
Hats off to you,
Bear