Such object are bathtubs and wood floors for example. It works on different principals to produce real shininess rather than being reflective. This is not like pure reflection but similar. Set how shiny a material is by using its IOR (index of reflection). The higher the number, the less polish the surface will be. Set the texture irregularity of the material. For example, to make a mirror, set the Reflection to 1 for 100% reflective. This is the option you will most likely use. If you leave it in the 'Off' position, this selected material will not emit any light when rendering your model. If you want the selected material to be a light source other than the sun and sky, select this option and select 'On', then set the power of the light source along with the coverage angle. 'User Defined' and 'Light/Emitter' as described below. Now you can make changes to the selected material using one or more combination of the following. The selected material name will be displayed in the 'Raylectron Material Editor' window. Next, select a material from the 'Sketchup Materials' window, or use the Sketchup 'Sample paint' picker to directly select a material from your model.
First, bring up the 'Raylectron Material Editor' (if not already opened) from the Sketchup 'View / Raylectron Render' menu.
It is very easy to apply some styles to your materials.