When I was in the Marine Corps, I was a Flight Equipment Tech (all the stuff the aircrew wears before hopping into the jet along with aircraft mounted goodies like Parachutes for one). Anyway, there were a lot of exposed stitching and that's exactly what we used. Before knotting the thread up, we'd run it along a brick of beeswax, tie it, knot it, and then take a lighter and melt the ends as to not fray. Now I know the lighter part isn't applicable to Crossfire stitching, but we did use the beeswax. Has a different consistency than candle wax. Plus beeswax is goo for lubricating zippers as well..


Justin