Doug Miller wrote:
In article et, Norminn wrote:


You don't normally need to prime a wall that is already painted.


Not normally, but in a case such as this -- where he's painting over a color
that will be difficult to hide -- a tinted stain-blocking primer can be a
great help.

Primers have a lot less hiding power than paint. Why would you prime
and paint when two coats of paint would cover better?