is a pressure washer enough?

I am not an expert, and have been out of the business since joining the service in '85. I think that this depends on the finish that you are wanting and looking for. Have done this before and the paint job held up on the implements as well as any other methods. I also took a steam cleaner to a Farmall M that we were prepping at one of the shops that I had worked at. After I got through with it very little sanding was needed, and it primed out well then when one of the guys I worked with did his magic with the paint gun, it looked brand new. I knew the guy that bought it, and he kept it in the shed after use. 5 years later it still looked real good. I would say that it depends on the finish that you are looking for whether or not to pressure wash it, primer and paint it or not. But then again, I am far from an expert at anything, and definately not a painter.