I'm trying to create a metal funnel with "teeth" on the inside for grating food items. So far, I haven't had much luck. I tried creating it in sheet metal, with a forming tool but, formed features won't work on non-planer faces. Creating them in the flat and then bending doesn't work either. I've attached a pic of the type of teeth I'm looking to use. Any ideas on how to do this on a non-planer object?