I use the paraffin/naptha mixture but I dissolved the wax in coleman fuel since I had it around and the main component is naptha anyways. l use this at the bench and muscilin while on the water. Works good for me. I tried the dissolved wax concoction on the water and found the same oil slick thing but if you let it dry before using it, the wax seals the fly up pretty good with no slick. I was thinking of trying albolene to replace the muscilin, but I just haven't gotten around to it.