Found the script to outline a polygon selection:

script: /* Select edges v1.4 */ var gd=moi.geometryDatabase, so=gd.getSelectedObjects(); function ss(o,v){o.setProperty("selected",v)} function sl(o){ for ( var i=0; i<o.length; ++i ) o.item(i).getEdges().invertProperty("selected");} gd.selectLoop(); sl(so.getFaces()); sl(so.getSolids()); sl(so.getOpenBReps()); sl(so.getSingleFaceBReps()); ss(so.getBReps(),0); ss(so.getFaces(),0);