We’d been reading about this technique called ‘vapor treating‘, that is supposed to smooth out the surface of prints. Bathing them in vapor of a solvent would blend the ridges so typical of 3d printing, so that the part would look almost injection-molded. This looked like something we’d like to try ourselves.
Different plastics require different solvents. The solvent for ABS plastic is acetone, which is both widely available and not too toxic. We have a lot of pieces lying around from semi-successful ABS printing experiments which are perfect candidates for some smoothing.