On Fri, 14 Aug 2009 15:43:08 -0400, "Ray"
wrote:

Some years ago I painted the interior trim in my house -- baseboards,
windows, door facings etc. First with a coat of quality primer, then a
semi-gloss latex.

Question: If I use exactly the same semi-gloss paint, do I need to first use
a primer or some other dulling solution?

Not in my IMHO.

Use a 000 or 0000 steel wool pad to rub and freshen the surface.. Then
clean the trim with a painter tac cloth and then paint with your gloss
paint.

YMMV