I thin you'll find a lot of things made of steel, Aluminium or other metals can be rescued (steel being more durable then most others), and reused if enough time and care is put into rectifying the fault at hand (cracks filled/welded, abrasions removed or as the Bug shows, new subassemblies created). The only way they would be truly gone is if they had been smashed to pieces or suffered corrosion so bad that there is pitting absolutely everywhere.