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Old May 19th 09, 11:49 PM posted to rec.aviation.homebuilt
cavelamb[_2_]
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Default How long does it take for phosphoric acid to dry?

Michael Horowitz wrote:
I've begun removing rust from my fuselage.
I got one bay down to metal and applied phosphoric acid to remove any
rust in the pits.
How long should it take this stuff to dry? - Mike



Depends, of course, on how wet it is.
Like on the bottom of the tubes?

But generally, half an hour.
PROVIDED there is some light surface rust to kick it.