No clean-up necessary, just drag and drop into your scene and render.
The preview images are rendered in blender 3.0. Cycles, Eevee, viewport, clay and wireframe renders are posted.
All the models Clean topology based on quads.
Real-world scale,The unit in blender is centimete.
Materials and textures are PBR, the photo textures format is jpg. Blend file is texture packed and a .rar file of textures is also included.