The Getty Conservation Institute said Monday that "America Tropical" will open to the public in downtown Los Angeles 80 years after it was painted.
The restoration includes a viewing platform and a canopied shelter to protect the work.
Leslie Rainer, the Getty's supervisor for the project, says the mural was cleaned but the paint was not retouched in order to maintain the work's authenticity.
The mural depicts a Mexican Indian tied to a double cross with an American eagle above him and revolutionary soldiers closing in.
Viewed as controversial, the mural was whitewashed several years after its completion and largely forgotten.