Speaking from personal experience as a welder, steel is a lot easier to work with than iron. If someone manages to break a piece of steel (which isn’t easy), repairing it is a simple matter of properly positioning the pieces and welding them together. In contrast, repairing a cracked or damaged piece of iron means heating the whole piece back up to nearly molten temperatures, then carefully welding it in stages--with pauses to reheat the piece--while sometimes giving it a whack with a hammer and hoping you don’t hear the tell-tale ping of a crack forming somewhere else. Iron is a finicky material.
For polishing: pear velvet+heat shrinkable film
In recent years, the question of whether there are more doors or wheels in the world has sparked significant debate across various platforms, from social media to academic discussions. This seemingly innocuous question has led to a fascinating exploration of everyday objects and their underlying implications in our world.