in accordance with the present invention nanoparticle fillers are added in levels of only a few percent by volume as a result the resistance of polyolefins to the standard mar and scuff tests can be doubled or even quadrupled this allows these lower cost materials to be used for the interior trim component without needing paint to be adequately resistant to scuffing and marring the automotive parts manufactured in accordance with the present invention comprises a composite material of a polymer having dispersed therein reinforcement fillers in the form of very small mineral reinforcement particles the reinforcement filler particles also referred to as u201c nanoparticles u201d due to the magnitude of their dimensions each comprise one or more generally flat platelets generally each platelet has a thickness of between about 0 7 1 2 nanometers the average platelet thickness is approximately 1 nanometer thick the preferred aspect ratio which is the largest dimension divided by the thickness for each particle is about 50 to about 300 at least 80 of the particles should be within this range if too many particles have an aspect ratio above 300 the material becomes too viscous for forming parts in an effective and efficient manner if too many particles have an aspect ratio of smaller than 50 the particle reinforcements will not provide the desired reinforcement characteristics more preferably the aspect ratio for each particle is between 100 200 most preferably at least 90 of the particles have an aspect ratio within the 100 200 range the platelet particles or nanoparticles are derivable from larger layered mineral particles any layered mineral capable of being intercalated may be employed in the present invention layered silicate minerals are preferred the layered silicate minerals that may be employed include natural and artificial minerals non limiting.