If you're looking to get parts printed, Materialise can indeed help you in a few different ways.

Our i.materialise service is more focused on consumers, students, jewelry designers, etc.
More information on this service and about 3D printing in general can be found on the i.materialise support site.

The Materialise OnSite service is mainly used by professionals who need rapid prototyping and manufacturing in an industrial environment.
The OnSite support site has plenty of information about 3D printing, materials, and powder usage.