Cement stucco on adobe blocks

I have been asked about bonding cement mortar to adobe (dried clay) blocks.

I haven't ever worked with adobe, but I have heard this from people from Central America, where adobe is still used a lot. Don't laugh at adobe. Adobe is almost earthquake proof, has excellent thermal mass, and is as earth friendly as a building material can be.

Adobe is essential is restoring historic buildings in the Southwest and other places.

Here's the mystic secret:

Before stucco application the adobe blocks are splashed with lime, that is a soupy mix of lime and water. The lime soaks into the surface and hardens the surface. After the lime dries, it is real porous creating good suction for a bond with cement mortar.

I haven't ever done this, but it seems real credible to me. Also, I heard about the lime trick from reliable sources.