I am refinishing a cabinet with a barn wood plank top. After sanding it down to 220 grit I applied a coat of linseed oil. Unfortunately while at work today it rained, and while it wasn't directly exposed it got wet enough to raise the grains.
Will I need to re-sand after it dries?
Sanding oily wood will quickly ruin your sand paper. However, whether it should be resanded depends on how much you care about the finish. As a matter of practice, when I make "fine" wooden pieces, I purposely wet the wood after my first 220 sanding; after allowing it to dry, I sand off the fibers (or grain as you mentioned). And I sometimes repeat the wet, dry, and sand routine if I really need get rid of those fibers. I do this so that few fibers appear if the wood accidentally gets wet, or especially if I am planning to use a water based polyurethane to seal it.
