We’ve seen acetone used to smooth out 3D printed objects before – either by dunking the parts in an acetone bath or brushing the solvent on – but these processes had mixed results.

CAD files showing how to print a gun are now back online Blueprints for 3D-printed guns ... device - known as Ghost Gunner - that can turn parts purchased online into a fully working weapon.

Police might push for a ban on downloading plans to build 3D guns, following the country's first prison sentence for using a ...