Stainless Foundry & Engineering Inc., which does sand casting, investment casting and machining services, is planning a $15 million capital investment at its location on the north side of Milwaukee. The Milwaukee Plan Commission discussed the project at its meeting on May 19. Founded in 1946, the company requested a zoning change for its property at 5168 N. 34th St., a building that had been used as a church, from local business to industrial-heavy. The company also requested for its property at…