Part smoothing for 3D printed parts, especially parts printed in ABS, has been around for a while. The process of exposing an ABS part to acetone vapor turns even low-resolution prints into smooth ...

The UV-curable resin I tested is Clear Standard resin from ... usually along with using fillers like Bondo Smoothing with solvents (e.g. acetone vapor bath for ABS) XTC-3D (a gap-filling liquid ...