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Primer.
am i right that primer is porus and there for if i paint a previously rusty patch and then primered and top coated it would rust from the inside out?
so say if i was to be repairing a wing which i had to bring bits back to bare metal, what should i use insted of primer?
or am i talking BS?
Martin
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Yes its porous.
Use etch primer on bare metal.
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Halfraud sell it as Zinc primer.
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Fibre glass it from behind & use an under seal or stone chip type protector to avoid any extra seepage from behind....
Sounds like a bodge.