Pretty sure it is water...and all sides are primed
Yes, just lightly sand it and paint.
Yes, it would work well for a board and batten look. I have used it many times for a craftsman look trim.
yes you could do that.
no it is not.
Yes, a medium grit sandpaper of about 400 should work fine. Work from the board to the edge. When smooth enough for your needs, then you can prime it and then paint the desired color.
Great product straight true and easy to work with, I recommend these trine boards!
Yes it would, just a light sanding and then paint, it's already primed.
pine spruce fir
It's Radiata pine, a species of pine native to the Central Coast of California and Mexico.