I wouldn't paint the insides. Mine are painted and I am consistently finding paint chips in my pots and I must rinse every little thing ahead of I use it just To make sure. If it ended up me, I'd personally get a pleasant shelf liner for that Wooden inside http://keeganaqnic.ivasdesign.com/18668277/the-best-side-of-how-long-do-painted-cabinets-last