The normal surface finish of FDM® parts is suitable for most purposes but in applications where a different finish is required, media blasting is an inexpensive and quick solution. It can be used to achieve the final surface appearance or as a preliminary step for subsequent finishing operations.
Common applications where media blasting is applicable:
• Smoothing and polishing for:
- Concept models
- End-use parts
• Surface preparation such as texturing and etching for:
- Mold masters
Answered with a tutorial: https://grabcad.com/tutorials/how-to-media-blast-fdm-parts