I share your frustration with the cold galv-products! I have tried
everything you have including wiping down the clean metal with vinegar and
using scotchbrite, etc. -- same-o, same-o --
I have been using a product called "Zinc-it" that I get from the electrical
section @ Home Depot. I found it to be quite durable AS LONG AS THERE IS NO
ABRASION IN THE AREA. But, like you, I find that I can rub it off quite
easily with a flick of a finger nail within 24 hours -- On the other hand, it
is not as easy to remove once it has setup for a few days in the hot TX sun
but is still far from what I would term as being ideal. I have found that
thinner coats with at least twelve hours between coats seems to work better.
Regardless, there has to be something better out there??
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