STEP file without standard surface shapes

For a project I am working on, I would like to create a step file that contains a description of my solid model without referencing standard shapes. Right now, the step file contains many 3d points, combined to splines and then combined to surfaces and finaly solids. Mixed in with these surfaces defined from splines are cylindrical faces and ellipses and other standard shapes. Is there any way in Solidworks to make sure that the step file I create only has surfaces made from splines? Sort of an unsimplify command?

SolidworksImport export