I’ve seen that stuff on YouTube and it does look messy! I was looking at Electrolube HPA - http://www.electrolube.com/products/conformal-coatings/hpa/acrylic/ - or something like they use in this video - https://youtu.be/HOu5hRqSDtU. I’ve used liquid electrical tape on my small racing quads in the past and that’s quite messy.