Richard Savage wrote:


Does anybody have any experience of doing such a thing in the past? I
would
be grateful of some advice, particularly with regards to the materials
that
I should use?


I've seen it done with, as you suggest, a profile. But AFAICR it's done
in sections on a bench against a corner shaped former with scrim(?)
bedded in the plaster to give it strength. I can't remember how the
sections are held in place.

A friend of mine did something like this very recently. He made a 2m
long trough with a right angle back. This was supported horizontally
with the right angle rotated through 45 degrees to create a vee shape. A
good coat of wax furniture polish on the inside of the trough to act as
a release agent. Then insert a couple of narrow strips of expanded metal
mesh (Expemet or similar) for strength. Finally partially fill with
casting plaster and scrape with a ply profile copied from the original
cove. Building up layers and drawing the profile along the trough each
time until the required shape is achieved.

Some final making good with a thin layer of artex was then needed to get
the new stuff matching the original closely enough.

Not quite as messy as trying to do it in situ - but still slow and
difficult to get an exact "can't see the join" match.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/