Are you saying it makes it too Sharp or that it leaves a toothy edge? Many people strop with diamond paste/ spray with excellent results, myself included. In fact I had terrible results stropping and actually dulled my knives until I got diamond spray. Now my knives are much sharper than they have ever been and sharper than any factory edge (that I have experienced).
Both, I find stropping with billet paste for a well-honed straight razor to be both toothy and too sharp. Stropping with CroOx or Mother's mag will leave a sharp yet "smooth" or "soft" edge that doesn't readily bite in to skin like Billet paste will.