Abstract: A method for arranging at least one through-channel in a solid body, such as a hot runner, which includes the steps of:(1) providing at least two solid blocks which have complementary side faces and which are together sufficiently large to form the body,(2) forming corresponding grooves in the side faces of the solid blocks,(3) placing the side faces of the solid blocks together such that the grooves together bound a channel,(4) coupling of the blocks into a body, and(5) passing a liquid abrasive agent with force through the channel for a certain period of time in order to modify the channel into a desired rheological form through honing, which honing may be pulsating.