"Roger" wrote

Guaranteed to turn anything white that touches it after a year of two
outside. House paint is supposed to be self cleaning, or at least it
was.

How the latex will perform in the chalking regard, I am unsure of. Of one
thing I am sure of, Latex paint has changed much, in the past few years.

Paint manufacturers are being "encouraged" to get more and more away from
oil paints, with all of their volatile substances, so they have improved
latex's quality and durability, greatly. It will be interesting to see how
they hold up on planes in the long term.

I seem to recall that new car auto makers are now beginning to use paints
almost totally lacking in volatile.
--
Jim in NC