Honestly, I was speaking of outdoor applications where the elements make the wood breathe, expand contract, crack. And preparing it to make it smooth was always a pain - and I have had resins come up through the paint. I think you're OK.
Wood has such a range of quality that even the time of year it's harvested affects its life and stablity. Musical instrument manufacturers, the good ones, are VERY concerned about the type, texture, tone and particularly the age of wood. They buy pieces of wood by auction sometimes and will walk around and lightly knock on the wood to hear its sonic properties. All these things make it a more soulful medium, but also less stable. But indoor applications are less susceptible to these problems. I wouldn't worry, unless you are going to leave it outside
