On Wed, 4 Nov 2009 07:18:28 -0800 (PST), N8N
wrote:

On Nov 4, 7:53*am, "dadiOH" wrote:
Red Green wrote:
Like to add, when touching up even from an original can, blend/fog by
running the brush/roller virtually dry way past the area being done.
Differences are harder to notice.

IME and IMO this is the best solution for the OP assuming that the new paint
color is pretty close. *One can also feather out by diluting the paint.

It's not at all, that's the problem. I've had three different batches
of paint mixed and only one was close enough to even try putting it on
the wall, and it is clearly different - patches look like shadows.

I guess I just don't repaint often enough-- or maybe too often-- but
in 50 years of home-owning and doing my own painting, I don't recall a
single time that I tried to paint part of a wall-- and only a handful
of times that I painted less than the entire room.

Jim