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Several coats of any polyurathane/clear coat type sealant should work. Spray or brush on, doesn't matter.What is best to protect you'r paper mache prop from rain? This is my first paper mache project and I would hate to go through all that work only to loose it to rain. THANKS!
For those interested, Scott over at Stolloween is testing the weatherproof-ness of Charlie, one of his paper mache pumpkins.
He's staying out from now until Halloween, wind, rain or shine to see how he fares.