My wife bought a tile painted in oil last time we were in Mexico. It was smaller, but I think the same idea that artist used might work for you.
He folded cardboard into the shape of a roof over the painting and taped it together at the ridge. This gave lots of handling areas. You could even close off the ends. Double up the cardboard if you must leave it in the hands of the baggage people. If you bring it carry-on, have the cabin staff stow it for you. They will do this for passengers who can really schmooze, a skill I would not be surprised to discover you posess in adequate quantity.
p. s. If anyone feels it is necesary, you may critique this drawing. The medium is cheap ball point pen on yellow sticky note, 2"x2". Digital manipulation is OK. Total honesty is encouraged.
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Will Enns
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