As an alternative to POR 15, I am currently using DOM 16. (Less expensive than POR and available at NAPA)

The restoration shop that did some welding for me recommended it. It seems very much like POR 15. It is a bit thinner and tends to be more runny than POR, but I find if I do flat surfaces first and then vertical, is firms up a bit in the paint tray allowing easier use on verticals.

As with POR, I am using it as a binder resin with fibreglass cloth for patching holes. Seems to work well.

Product is made by Dominion Sureseal - They make a large number of autobody products.

This is a write up on the product (from Australia!) :

SMASH SUPPLIES :: Paint :: Dominion 16 Ultimate Rust Preventative Coating 1LT

I read up on Zinga and watched the video. Seems like a good product for it's intended purpose. When i worked in the chemical industry, we used a similar paint for steel chimney stacks. Seems more of an industrial/commercial product than one for DIYers?

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5