[PyMOL] surface properties

[Mark Collins]

Hi All
I have searched thru the archive and couldn't find an answer, to this.  I
would like to make pymol surface(s) colored by (1) hydrophobicity and (2)
concavity/convexity.
These are easily produced in grasp, so one possibility maybe to import
some type of grasp file.
Thanks in advance for suggestions, websites, or tutorials, etc.
Mark