Hello all, need some help. I make small signs with saying on them....usually smaller than 12" x 12". I recently bought some MDF and really liked it. I loved that it was smooth and not warped. Before I had been usually whitewood that you get at Lowes. Then I started reading in forums that MDF is bad with moisture and the outside. Do you guys know anything that is similar but can take the outdoors better. I have tried Pine ply but I hate the edges on them. I have heard of MDO but I heard its pricey ! Any advise helps ! Thanks!