To preserve the textures while the artists work, outdoor sculptures like this one by Sandy Feet are sprayed with a sealant that is similar to highly diluted Elmer's glue. Read more: Sand Castle Pictures - Gallery of Best Beach Art - Popular Mechanics
When carving an Emu egg, It is also important to protect the inside of the shells, as the white layer is only 0.005- to 0.006-inch thick. For this, you could use a mixture of 50 percent Elmer’s glue and 50 percent water. Coat the inside of the egg several times with this mixture prior to working on the egg. If you consider carving chicken or goose eggs, in which case you might have larger empty spaces or fine filigree work, this is an especially important part of the process.