Quoted from Trekie:
Printer juice is costly and a short shelf life. The parts I have handled from SLA are brittle and were not suitable for use on a playfield. Yes the detail is better as it comes off the build plate. There is a lot of mess involved with a SLA printer, no click and go and when the print is done the clean up begins.
There are plenty of companies that make resins which when cured produce production ready parts, however they are very expensive like $2-300 a litre. Accura60 by 3d systems is one example.