I haven't noticed anyone talking about zinc dipping. Instead of
pondering the merits of primer paints' porosity and so on, why not take
your frame to a galvanizing shop and have it dipped? Zinc is one of the
least noble metals and as a result the galvanic process actually works
in your favour for once. In the event of a bit of frame metal becoming
exposed underneath the galvanizing form a rock chip or whatever the
ensuing electrolytic process will actually have zinc adjacent the
exposed metal migrating to it to close it up and further protect it.
You can paint atop the galvanizing should you want a more authentic
appearance and have the comfort of knowing that the little inferior zinc
molecules underneath are quietly taking care of your frame for you. If
you are just attempting to preserve your frame until you make further
decisions, you can dip it and put it aside without any further attention
until you decide to proceed.
The same applies for body panels and other metal components
throughout your vehicle. It is not expensive, quick but for the size
you would have to locate a galvanizer in your area with a tank big
enough. Certain auto manufacturers do this for the complete body shell
prior to painting - Porsche comes to mind.
Peter
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