Pack of three paint shields. These will fit on the pipe you put your tumblers on when spray painting them. This will stop any spray paint getting into the top rim of your tumbler, and will save time on needing acetone to remove the paint.
Please choose between the hole sizing of the white piping (in photo) or the metal piping of my MB design turners. If you are needing a different sizing, let me know so I can print these to your measurements.
This is not made of silicone, so will not work against epoxy. (You can always glue a silicone sheet to this to make it epoxy resistant.