I modeled an old, rusted helmet and I want to share my work with anyone interested. I'm sorry that the files do not come with the texture. If you want, everything will be included in the blend file.
OBJ (OBJ, filesize: 23.9 MB), DAE (Collada, filesize: 30 MB), BLEND (Blender, filesize: 7.5 MB), FBX (Autodesk FBX, filesize: 13.9 MB)