Which type of primer to use on new T&G planks?
We are about to install tongue and groove (pine) beadboard planks in our small powder room. It will be painted. I know from reading here that I should backprime. The wood is primarily clear, but there are some planks w/ knots that we may have to use. Is there any need to prime and/or backprime everything w/ Zinnser BIN or can I just use the BIN spray primer over the knots and then go ahead w/ BM Fresh Start Acrylic primer? Or should I use something else besides the Fresh Start?
I will also need to spackle over these knotholes--after I prime (correct?). I have some DAP sandable/paintable spackling (the kind that goes from pink to white as it dries). Is that suitable or is there something else that would be better?