On Thu, 22 Mar 2007 20:58:29 -0400, alexy wrote:

I have a buildt-in bookcase with a 1/2" ply back that [nearly] meets
up with a wall that is slanted in at the top at 45 degrees. The back
of the case and the wall are painted with the same flat wall paint. I
want to put a cove at the junction of the plywood and drywall,
probably with a 2-3" radius. That means that the material I build the
cove out of will be up to 3/8" thick. I have both plaster of paris and
drywall joint compound. Which should I use and why?

PS: A molding strip is out--I want to camouflage this intersection,
not highlight it.

PPS: I guess that Lew is going to suggest epoxy with microbubbles. How
hard would that be versus plaster or mud, and what would be the
advantages?


Plaster or joint compound will crack. Bookcases have a tendency to
move around a little. I'd use a wooden cove painted the same color
with paintable caulk. The caulk can flex a small amount which is what
you want.