I painted the gravestones using 3 of the “Stone” spray paint colors.  After I had used up the cans I was left with two gravestones that needed painting, for those I mixed black paint into the Gesso and made grey. To weather the stones I mixed black paint with water and used various brushes and rags on the stones:

The lettering was painted in using black paint by my understudy.

A steady hand he has, I must say!
Part 1 can be found here: Part 1
Part 2 can be found here: Part 2