Two articles in the recently renovated Microscopy Today are worth your time to read.
First is application of SEM/EDS to archaeology on Page 28. It presents two case studies where ancient paints are analyzed using SEM and EDS. The second case study has an interesting observation on using the ratio of Pb M(beta) to Pb M(gamma) x-ray lines to possibly discriminate lead oxides from lead carbonates (which is kind of a big deal).
Second is an overview of how beam deceleration is used to improve low accelerating voltage imaging in non-FE SEMs.