I'm getting estimates for interior painting in an old house. (I could do it, but don't want to do it.) First estimate from a professional painting company was quite high, so I was going to see about getting estimates from local journeymen. The pro told me that since it was an old home, his intentions were to start with an oil-based primer, and then paint with a ______? Stupid, stupid me, I can't recall for sure what kind of paint he said he would use. Would he have said oil-based or latex? Wouldn't you need to put an oil-based paint on top of the oil-based primer?