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DuPont makes Variprime 615S/625S Self-Etching Primer. It has been
recommended to me by a retired FAA engineer. As far as I know, this self etching primer needs to be coated with a sealer, such as urethane paint. O It is porous, and therefore is not a moisture barrier. I use Akzo Nobel 2 part epoxy primer (the ugly lime green stuff). You need to do the alodine thing (pain in the butt), however the surface now is scratch proof and moisture resistant. It meets Boeing spec. BMS 10-11 for fuel resistance etc. Very good stuff, and about the same cost as Variprime if you include the Alodine. Labor cost is the only variant. You can get other brands that meet BMS 10-11 as well. You can also get some self etching spray bombs, such as Marhyde, however they scratch very easily. |
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