ZBrushCentral

Is it possible to polish edges at particular angles only (greater than 90degree)? image attached

Hi,
I’m trying to polish a model so hard/crisp edges are smoothed out and don’t look so CAD like. However, I only want raised edges smoothed, while recessed edges left alone. Attached an image for example (i would like the lines in red color (greater than 90 degree angle) smoothted out but the green line left alone as is). Is it possible without having to manually smooth by brushing? Perhaps some deformation polish or another tool I don’t know? Thanks
zbrush-angle