Hood Louver Press
Hood louver press jig. I backed mine with 3/8 steel plates, then clamped them together with four M6 bolts (could also use 1/4-20), but could likely get away with far less than 3/8 steel. Could also use this in a shop press, or hammer them together to avoid the holes. Does not need to be pressed solid for most metal, they are surprisingly robust.