I saw my dermitoligist and he gave me an instruction sheet re: shaving It said, among other things, to shave with the grain. But it didn't say Only shave with the grain. i.e. no chevron passes.....
He said going against the grain you may run the risk of getting ingrowns, razor bumps. and irratation. Some people can get away with it, others can't.
If there's a Dermi in the forum, that could also answer my question, I'd appreciate it.