Jonathan Grobe wrote:

Do you need a primer when putting white latex house paint over white
latex house paint?

Behr and other brands have all in one primer and finish coat. You'll pay
more per gallon, but the convenience might be worth it.

In addition to cracks and chips, look for chalkiness / oxidation. Rub your
finger across the paint, if dust comes off the same color as the paint
(disregard normal dirt / pollution), the paint is not a fit surface for
new paint. You'll need to power wash or scrub brush the surface before
painting. If wood is involved, allow many days for the wood to dry because
a power wash injects water deeply into the wood.

--
Tony Sivori
Due to spam, I'm filtering all Google Groups posters.