How can i make a plaster sculpture more protected?

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I have a plaster sculpture, and i worry that because plaster is really fragile, I'd like to I guess coat it with some hardening-surface that makes it less delicate and less easy to brake or chip.

Do you think maybe a SEALANT ---- sprayed or painted-on ---- might make it more protected ? ............. Thanks very much. .............. It's like this:

q how can i make a plaster sculpture more protected
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