How to detach geometries or another way of seperating a material


I build my models in sketchcup 15 and 16. When I launch the Fluidray inside sketchup one or two materials do not show in the interactive display and Fluidray compensates and replaces the missing material or texture with another material or texture from my scene. The problem is two objects will have the same material and you can clearly see the difference between my sketchup interface and Fluidray interface.

I accept that may be a bug which will be ironed out soon as Fluidray progess.

Now if you look at the image upload of a Calculator, I would like to know how I can explode the calculator so that I can apply different material or texture to the calculator button so while the casing and other geometries stay the same colour