Q: What's the difference between the #407 and #410 fairing fillers?
The #407 is a micro-balloon-based low-density filler that cures dark red/brown and carves easily, while the #410 Microlight is thermoplastic-based, sands to a very fine feather edge and cures off-white; choose #407 for carving thicker fillets and #410 when you want the smoothest possible final surface.












