This is a nice do it yourself assembly project, you could lacquer or paint the MDF but why bother, it looks fine like this. The shelves shown are 6mm thick, they can also go down to as thin as 4mm if required.
Supplier of Wooden Kit Boats,CNC design,epoxies,bronze nails,Meranti,Oregon,Oak,Beech,American,Teak,marine and exterior grade plywood,bending plywoods and Flexible veneer sheets,teak and holly flooring sheets. Agents for these and many other companies: North Sails,Harken,Lewmar,Ronstan,Raymarine,Yanmar,International Paints. See also our blog on cars,its another side of what we can do,try this link http://royckdboats.blogspot.com/