Marking naked edges on open polysurface (without borders)

Is there any trick to see/mark all naked edges except those edges which are borders of the open shell?

When I`m doing ZoomNaked edges I can mark and see all border edges and bad edges. I would like to see/mark only bad ones without borders (which are good ones).

Hello - you could DupBorder and then BringToFront the results, deleting the actual border curve that you do not care about.


Thanks. Should I manually select and delete border curves?

I would like to omit manual selecting/deleting.