Prime and caulk or caulk, then Prime?
I have brand new wood siding on my garage, the nails have been countersunk, and I'm prepping this new siding for paint.
I have found online advice that says first to seal each countersunk nail with caulking, and then spot prime, before painting.
I have also found online advice that says to spot prime these countersunk nails first, and then caulk to fill in the holes, afterwards.
What do I do first? Prime and caulk? Or caulk, then prime?
Secondly, the siding I have comes already "primed" with a very thin layer of paint or primer. Do I need to put additional primer on, before applying the final layers of paint?