Most common ways to smooth 3D prints

https://www.xometry.com/resources/3d-printing/smooth-3d-prints/

1. Using Paint and Sanding Material for PLA filaments
2. Using Abrasive Smoothing Methods
3. Using XTC-3D epoxy resin
4. Using 3D Gloop
5. Using PolyMaker PolySmooth PVB Filament
6. Using Chemical Smoothing like Resin, Ethyl Acetate, Acetone for ABS filaments or Isopropyl Alcohol for PVB filaments
7. Using Heat Gun
8. Using hardware like Polymaker Polysher
9. Automotive Spray Putty for PLA

Note: Some methods apply to only a few types of 3D print technologies