Referring to the long flat section, yes, but not to their sides. I'm referring specifically to their top and bottom edge. If you look at an Imperial cruiser, you'll see the top has an overhanging edge with a bunch of detailing work. Basically like the roof of a long cathedral structure, or crenelations. The underside suffers similarly, but that tends to have more flat strips than points. I have no idea if I'm making any sense. Pick up your nearest imperial cruiser and look at the bits above and below the weapon modules ^^
As for the prow, yeah; I'd say go with some of those tiny little guns, maybe some slight accenting on the prow shape - a raised edge all the way around?
I've also noticed chaos cruisers have teeth shapes along the underside of the prow, but I suspect you'd want to avoid those and go for a more Imperial look? Even then, the underside could do with some additional detailing... Supporting "columns" perhaps?