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Kimberly,
No, the Golden's recommendation to use their full-bodied acrylics if you are going to put oil over it, is not just marketing on their part. They are an unusually artist friendly company that goes the extra mile in the technical department.
Their full-bodied acrylic is formulated the same as Acrylic Gesso, and so will give more tooth for the oil to stick to. That way if you are comfortable painting in oil over acrylic primed canvas, the Golden full-bodied acrylic gives you the same surface with colors.
They had told me they were planning to do their own experiments in oil adhesion to acrylic paint at some point, and will publish the results.
Others will have to help you with the canvas rolling question, as I don't have personal experience with it. Though I believe it can be done with a dry enough canvas, and rolled in the largest circumference you can deal with.
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