

Can I sand down peeling plywood or do I need to rip it out?
My 1940s house has board and batten siding. I’m replacing the rotten pieces and painting it all but am not sure what to do about this underside piece. It looks like 1/4” ply, flaking apart. Can I sand the remaining layer, prime, and paint? Or do I need to buy some 1/4” CDX? I just really don’t want to deal with scribing the side that sits against the stone. I’m sure it’ll take me forever.