Repurpose the waste from the imprecise assembly of machines for new materials. No process is ever truly perfect.
Mods introducing new content into the game.
New Ores and resources as well as machines.
Furnaces, assembling machines, production chains.
Not sure if this is intended or not - using roc's rusting iron, iron scrap correctly rusts into rusty scrap, but can be shipped at 10000 units per rocket as compared to 500 per rocket for regular iron scrap.
Hiya! Good catch, I'll fix that as it's definitely not intended