Did that happen automatically when you imported the OBJ file or will you have to do it manually? There are a LOT of those kinds of edges on this model. A significant portion of the time I spent building it was invested in smoothing those edges correctly.
Any chance you could do a render of the same part of the model I showed above? That's the outer surface of one of the curved "ring fins" that branch off the booster engine housings. I'd just be curious to see what it looks like in Lightwave.