I bought a gallon of Zinsser, low-odor, stain-and-odor-blocking, oil-based, primer. We bought it primarily for the subfloor we found after tearing out the carpet and seeing some various pet stains.

I also built a new mantle as part of the room remodel out of pine. It's quality pine, but still a knot or two. Is any oil based primer sufficient to fully cover pine or do I need to go with some special just for pine?