I haven't used DN but have used Famowood Duratuff and had the same result. After experimenting, what worked for me was a single brushed coat, not multiples, dried on a lure turner for the first few minutes until the solvent evaporated. Then hung while the poly moisture cures over the next 24 hrs. When I dipped and hung them, the poly would collect at the bottom of the lure and cause a rash of bubbles there. So far, I have no complaint with the single coat poly. Although it's thinner than epoxies, it is tougher, clearer and slicker and has held up well for bass fishing.