I think I jumped the gun here. I started finishing the insides already. Then I see that there are more posts. Oh well. The drawers are 3/8" luan with a center ball bearing guide and little plastic rub pads on the 2 sides. I was going to just seal them with urethane when I did the entire piece, but (gulp), I dripped some stain on it and it kind of took off from there. In my opinion I think they look much better with a finish. I'll just wait untill it's absolutely dry before she starts using it. My lesson learned here is; Slow down and get the information first. Thank you all. Rick.