I am stripping the exterior of my house down to the wood, repairing the wood with bondo and then priming it with Sherwin Williams oil primer. The problem is I usually see many a few missed blemishes after I have primed it. I have been told that bondo shouldn't be used over primer. What should I use? I am looking to have this last as long as possible. Is something basic like Elmer's carpenter's interior exterior wood filler good? Or is there something better?