Board Thread:General Discussion/@comment-27174095-20171114023949/@comment-27599871-20190327225500

Since you can hit, but not damage stands with mundane objects, and both stands and hamon are considered "life energy" it would make sense that if you were channeling hamon into an object and hit a stand, it would damage it. Hamon also isn't just sunlight energy, it can be used as kinetic energy (enough force to counter the strength of a bullet). So while the sunlight part of hamon can't affect humans, the kinetic energy could be distributed into the stand, damaging it.