What are your recommendations for paints and sealants? Which brands do you see the most success with? Which are definitely nontoxic for bearded dragons?
Which are you gonna use? A wood sealer or a paint?
I haven't used paint on the inside before, but pretty much all wood sealers will cure to be safe.
Pretty much everything will be ok for a dragon as long as it's been given ample time to fully cure. This at a minimum means you dont detect any smell anymore.