flash rust

[70bee]

If a car is sitting in a new garage that is sealed pretty well how long will bare metal last b4 is starts to get flash rust? How long till putting etch primer would be a waste and have to re-sand.

thanks

[Phil V]

The answer to your question depends on several unknown factors. What is the humidity in that new garage, the temperature etc.

[Len]

If I were using etch primer I'd want to have it primed within about a week just to be safe. If you coat it with Picklex you can let it sit for months then epoxy prime it.

[CraigS]

If 'new garage' also means new concrete floor, there's a lot of moisture coming out of that slab.

[Kamcoman]

I have tried what you want to do and my body panels started to show some flash rust after only a week. I rubbed it off with a red Scotchbrite pad and sprayed a Picklex-like liquid on all the bare metal. Wiped it down with a clean, moist baby diaper and let it sit. Metal is slightly gray after treatment. No flash rust in over six months. :p

Keith