1. New 2. Import -> STL 3a. Workbench "Mesh Design" 3b. Meshes menu > Analyze > Evaluate & Repair mesh 3c. Select mesh from "Evaluate & Repair" pane 3d. Go down the list, click "Analyze" and then "Repair" If any option makes your mesh look terrible, skip it. 4a. Workbench "Part" 4b. Part menu > Convert to shape 4c. Part menu > Convert to solid 5. Export as STEP File "STEP with colors (*.step *.stp)"