Recently I have been working on a couple of portraits of musicians. The faces of Ed Sheeran and Leonard Cohen, both depicted using a .95mm drill in 3mm ACM.
Leonard Cohen (Bird On A Wire)
Some examples of work 1999-2018
Density and sparsity of drilling vary levels of shading , a single hole in the correct place can capture the essence of a glance or smile.
Drillworks. 