I need some input on filling tube spirals on Loc paper tubes. I have tried Dap plastic wood filler as well as Elmers wood filler and epoxy clay for this. I am wondering if it is worth the extra work. I tried it on a scrap piece of tubing with the Dap filler and epoxy clay and even after using an automotive grade primer, the results were still bumpy. It would have looked better almost to have left it alone. Perhaps I didn’t sand it off good enough (Should have sanded it to where only filler was left in the spiral itself) but if you get too carried away, it starts to remove the glassine from off the tube. Maybe that doesn’t matter if you primer it afterwards? I love the looks of a smooth rocket but I wonder if it’s worth the extra work on paper tubes? It would be if I could get the results I want but if it leaves it bumpy it’s just a waist of time. Any advice on what to do differently or do most of you not worry about the spirals?