Must be some good stuff.
I'm assuming that this high zinc primer has good anti-rust properties?Do you know of another primer that is almost/just as good?
it's sort of the best self-etching primer you can run.. sort of... the 2-part catalyzed zinc washes are... this is an air-dried version rattle can.. obviously a million times more user-friendly, certainly not the quality of the 2-part.... but a happy medium for the weekend warrior...
it's purpose is not rust, it's adhesion.. it is designed strictly for raw metal.... initially alum..... you pretty much have to use it for that, but the properties that make it work well there, help just the same for steel.... tho, when used over clean raw steel as part of a quality coating system, zinc, uro primer, quality paint, it certainly aids in the corrosion durability...
really the next best etcher you can probably run is a modern epoxy..... which is what many resto guys have gone to.. they stick pretty well, and have come a long way in their sanding friendliness.. I still prefer a uro for sanding, thus it's what I run over the zinc, and skip epoxy altogether... you CANNOT put epoxy over the zinc chromate... but once the zinc washes go away, the epoxy will be the choice... albeit, a big drop in user'friendly as epoxy is pretty much a gun only 2-part deal..
if the zinc chromate goes away, I'll probably try to run a 2-part for as long as that is still on the market.... albeit much more expensive and a pain to do...
here's a thread I did on the zinc chromate a few yr's back if your bored.....
https://ck5.com/forums/threads/zinc-chromate-tech.262999/
Is it going away, or was there just a shortage?
well, the scare is on.... they've been trying to get rid of anything with zinc for decades now... all our marine suppliers are showing it as discontinued, which is an ominous sign being that's where it get's heavily used...
