Vapor polishing is a great way to finish ABS, ASA, and certain other 3D printable plastics, but it's not very precise, and can damage parts before the surface finish is complete.

The castable filament I mentioned is PolyCast. If you buy through the following links, we can earn commission at no extra cost to you. Support your local art store first, if possible, though.

https://amzn.to/3uXHz4m - PolyCast
https://amzn.to/3aNmkLH - Dauber bottles
https://amzn.to/3o9VW1R - Pen-style bottles (good for detail)
https://amzn.to/3zh5oGI - PolyMaker ASA filament - my preferred printing filament.