I've recently been working on some older metal kits for my Space Marine chapter, the Eternity Wardens, here being inspected by a Techmarine before final insignia are added and the vehicles certified for service.
Out of the three of them, the metal Dreadnought is easily my favorite. The thing weighs an absolute ton, but looks as good as it ever did.
The Rogue Trader landspeeder, on the other hand, is a horrible nightmare of a kit to build. The details are soft, the parts fit and breakdown notoriously sloppy, and being a skimmer, basing it is also an issue. You can really tell it was sculpted by hand and cast in a fairly low-tech process. I've now built two of these, and hope to never do another one.
This Whirlwind suffered a bit of damage at my hands during the pre-painting disassembly and cleanup. I actually broke the V-shaped piece that holds the missle racks together, so I had to fabricate a new solution for the missiles, ensuring they're level and square, while handling the not inconsiderable weight of the metal pieces. The final assembly has several 2mm metal pins inside holding everything together.
It also amuses me that the exhaust stacks on the Rhino chassis, which are notorious for breaking on these old kits, had already been painstakingly replaced by thick brass wire by a previous owner. It's nice that I was able to retain some of the original owner's work even after I'd repainted and rebuilt everything else.