Hello! I got a bookshelf that I want to repurpose as a tort table for my Russian tortoise. It is Just a typical Looking shelf But, is it ok to use as is or do I need to clean wood or strip it?? The current backing is very sturdy so I would prefer to use it. I guess I’m just wondering if I need to use something as a Barrier under my substrate. I will be using orchid bark /repti bark And if so what?? is it ok to just set him up in there?