Originally Posted by ColoradoBuilder
If you are painting it I would recommend MDF. It can be milled just like wood and comes in consistent widths and straightnesses. I would use a stand off or build out primer instead of a bonding primer because MDF is porous and this will cut down on the number of finish coats.
Yes, alot of DIYers don't realize that you can buy MDF in 4x8 sheets
, in different thicknesses, and cut down to your needs, including, routering a nice edge to it for shelving....
For long shelves (over 8'), tho, you could still use a premium pine or poplar boards (12' +)....