Nikwax is a wax based DWR. I haven't read anything specific on the mixing of wax with the others. Most, if not all nylon/polyester technical fabrics are coated with a DWR from the mill they are produced from. If the lombard beaded water at all when it arrived, then it had a coating. What happens when you coat a fluorocarbon dwr with silicone is that some sticks, but is otherwise repelled by the fluorocarbon. So it is water-repellent for a very short time. However, if you try to coat it with a fluorocarbon based DWR again, the residual silicone will repel that! The net result is that you get a garment that wets out very easily .