a. i run a stroke along my mesh . the boney stuff is another subtool.
there has to be a way zbrush will ignore other subtools while sculpting yes? this has bugged me for years.
Attachments
Activate “Transp” 
Transp - enabled. Exactly the same result. Anyone???
That`s strange, I have tested it before trying to give you the solution. Tested it again and it works, see attached image.
Looks like you have x-ray turned on?