Home Depot carries what is labeled as kiln dried WRC, rough cut, that they suggest using for outdoor applications. Most of it, is indeed, pretty rough with lots of large knots. Picking through the 2x stock (true 2x, not 1 1/2''), I found a board or two that appeared more or less knot free with straight grain. Would this be acceptable WRC boat lumber if it was remilled and scarfed for proper lengths (for stringers, inwales, etc), or is there something that makes this wood unsuitable? I've also found building grade stud lumber that very occasionally, (read rarely to almost never), is knotless and straight grained and marked as fir. I find myself in HD probably twice a week and I'm wondering if I couldn't stop by the piles each time I made a trip there to check what they have and slowly collect my own pile of suitable lumber waiting for a project.