I personally dont bother C.A any of my chassis edges..I sand them round, and use wed / dry fine grit to give a glass like finish to the edges.
I havent had a problem with delaminating chassis in the time Ive raced.
I figure a hit hard enough to delaminate a rounded edge would still damage one with a thin layer of C.A.
I do file the edges of the battery slots slightly to prevent it cutting the cells shrinkwrap.