Would I need to sand them smooth? The wood is weathered quite rough, and stain/paint is still in the grooves. I think new stain (solid stain) won't stick. Then, I assume, a primer? I suppose that if the wood was done up right, future maintenance would be easier…although doing that much sanding would be tough. I'm not looking forward to replacing the wood, and carpenters/handymen around here are scarce and arrogant, as well as expen$ive.