i bought an aluminum radiator, and it came in a box with styrofoam forms around the tanks, and just a couple of styrofoam sheets protecting the core.
there was no damage to it.
just use some good ideas [common sense ?] when packing objects to ship, and the item should arrive at it's destination unscathed.
however, with that said, there are people out there working for all shipping companies, that go out of their way to destroy any and all packages they are tasked to deliver.