Moi has an SKP file export! ;)

Each object will be a "Group" it will keep the name from Moi!
Colors will losted

If you want keep the different Object as Component format inside SketchUp you must export as 3DS format

Inside Sketchup each object will be named obj1, obj2 etc...and will be a component!
Original Names will be losted
Colors will be losted!

In each case explode one time!

if you export as OBJ format from Moi you will have inside SketchUp name + colors but Groups! (no need to explode)
Made with a plugin ImportOBJ by TIG for SKetchUp 2017 Make (so free)
(maybe orient faces for have similar color in a same object! )
Maybe Native OBJ Importer for SketchUp Pro is more strong! ?