Board Thread:General Discussion/@comment-27174095-20171114023949/@comment-30487274-20181020230929

Yeah Hamon can only affect a Stand if it's channeled through another Stand.

Let's imagine Jotaro could use Hamon for a second. Star Platinum punching another Stand with a Hamon infused punch would be the same thing (let's ignore SP's super strength for a second) as Joseph punching a normal person with a Hamon strike. The Stand user and the normal person would both feel the effects of the Hamon on their body, but the former only because the Hamon came from another Stand.