I am trying to find out if it is ideal, if not necessary, to use an oil based primer on AdvanTech sheathing before applying the oil based paint. The website for AdvanTech seems to say two different things about the need for primer. This is the flooring for my new shed and I want to make sure I do this right. We are using a Valspar premixed exterior paint that I have been told is appropriate for a floor cover. Any feedback would be valuable. Thanks!