It would be great to have the ability to have 3D Coat identify unsymmetrical areas via an automatic paint that could essentially not only show where you have regions like that, but also to be able to ignore those areas when doing retopo/paint work.
Is there a Fill painted area or layer in the Paint room? If I want to change the specularity or color overall in a painted spot, i find it ranges from super easy to difficult. I know how to fill unfrozen.