And yes, great point! I'll definitely hit up the cavities with a bit of poly on the last two coats to ensure they're sealed.
Somewhere in the early 20's I tried a pour on the top rather than bottle -> rag -> guitar, and managed to get some to run into the control cavity, so the bottom of that is fairly sealed already. Should be able to get shielding paint over the top though.
Last edited by ross.pearson; 22-08-2021 at 06:06 PM.