Gels are less likely to produce oil slicks and do not need the drying time of liquids. They’re easier to apply in a very thin film than the pastes. Contrary to popular belief, all these gels worked well on CDC feathers if applied in a very thin film, worked into the material very gently and thoroughly, followed by fluffing up the feathers. Examination under magnification showed that the structure of the CDC feathers had not been compromised. The micro barbs stuck out at right angles as they did before treatment with the gel.