Iv'e read thru this thread and noticed that Wavy Steps were not mentioned. Trails and Wavy Steps appear to be caused by the same thing and i can't see how a buffing wheel or wire wheel could bend and distort the steps and not abrade thru them. There are also trail dies were the devices are doubled in size and do not show the distortion that you would expect to see from a wire wheel. Iv'e been collecting Trails for over 10 years and do not believe they are caused by polishing there are to many dies were a wire wheel or polishing could not make that many changes to the design.