We've recently gotten a sweet resin printer (the EnvisionONE from EnvisionTec) and it's producing amazing parts.  I printed the gas mask and bite bar and they are coming out much nicer in resin.  The threaded holes took the 1/8" threading perfectly with zero post-processing.  There are multiple online services that print parts in resin if you'd like to try without purchasing a printer.

Lastly, if you've read this far and want some resin parts to try please drop me a line and I'll print some and mail them to you :)