Some people have talked about SLA. We have a Project MJP at work (https://www.3dsystems.com/3d-printers/plastic https://www.3dsystems.com/3d-printers/plastic).

Some people have talked about SLA. We have a Project MJP at work (https://www.3dsystems.com/3d-printers/plastic https://www.3dsystems.com/3d-printers/plastic). It uses UV cured resins for its printing, it also prints in wax for the support structures, so you can just melt them away with an oil bath afterwards. The quality of the results is excellent - you can print some really fine detailed parts. The downside is cost (print and the materials) and the fact that the materials involved are pretty nasty - they come with some major warnings about causing infertility and cancer just for coming into contact.