For those who are curious about how to finish interior earthbag walls, take a look at this video by American Clay. Their website explains how “earthen plasters allow you to infuse your office with the texture, color and character of the natural world. Transform your home from a place you live into a place with life.”
Pretty nice, eh? And don’t worry, it doesn’t have to be expensive. One option is to use your local clay soil (typically available for free) for 99% of the work, and then put on a real nice finish coat to make it look good. Or if money is really tight, look for local colorful clay and/or add iron oxide pigments to make any color you want.
Photo credit: American Clay