Molding

I need molding that looks like the old fashioned plaster molding used to "picture frame" walls. That's the best I know how to describe it. It would be half round, detailed, and was used to make a plain wall more interesting. Something like this
_______________ / \ | | | | | | | | | | | | | | | | | | | | \_________________/
Ideally it would be foam of some sort, rather than plaster.
Anyone know of a source?
charles
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Charles Bishop wrote:

Most any Lumber Yard or DIY store should have stuff along that line. It comes in wood and foam.
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Joseph E. Meehan

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I think I didn't explain my attempt at drawing-it's supposed to be the outline of the finished "picture frame" where the lines are the molding forming a picture frame, not the outline of the molding itself. The corners are actually curved, rather than the straight lines I show. The molding itself is very ornate with vines on it.
I did some Googling after I posted here and there are on line sources. It's called panel molding and does come in plaster and polyurethane, but I can't find anything that looks similar, especially the corners.
charles
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Charles Bishop wrote:

Lowes and Home Depot sell that type of molding. they even have the semi-circular corner pieces (look like someone took a bite out of the corners).
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Charles Bishop wrote:

There any many many verities made. I am guessing you are trying to match something. That is going to be a problem. Some places will make it up for you, but then you will need to pay the price for custom work..
Good Luck
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Joseph E. Meehan

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wrote:

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You are probably working with somewhat larger molding, but I've repaired large antique picture frames, 3'x5', with 4" wide molding, corners and straight sections, by making a molds of a good section, casting the piece in plaster and gluing it in. There are flexible latex and vinyl compounds available from art supply stores for this use. Matching the finish was the hard part.
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interesting.
More details-there is panel molding on the wall in a lobby. There is also a section of wall that doesn't have the panel molding on it, and the owners want to add some. It doesn't have to be the same, since I'll never be able to find a match, but should be similar. Googling led me to suppliers (one in Ireland!, when I spelled it "mouldilng"), and some might be ok, but I'm looking still for a closer match.
Do you think it would be possible to make a latex mold of the (E) wall molding, on the wall, and use that to cast new pieces?
Thanks for the suggestions.
charles
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Yes. Build a trough, plug the ends with foam, fill it with latex-moldmaking compound, and brace the whole thing against the wall until it sets. (does latex need a parting powder to keep it from sticking to/staining the wall? It probably depends on how porous the plaster is.)
Another option if you've got decent woodworkers and toolmaker available to you is to take a profile using whatever that tool is that looks sort of like a comb with touching teeth, and use that to make either a router bit or a blade for a molding plane. Since you appear to be talking about curved sections of molding, the router bit would probably be easier.
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