I find that invasion stripes can help on light colored wings. For a quad I'd just paint it darker, see if that helps.
LOL the quad wasn't an issue; I was flying that through FPV. It was just getting blown around by the wind, and for something that weighs in at 3.5g, I'm not surprised it had issues.
As for the Nano Goblin, I'm already thinking of some tape or vinyl decals on the wings to make it stand out a little more. My wife has a Cricut machine, so I may be making something to slap on there and make it more visible in the very near future.