paint for me on monokote doesn't work. after some years, in the hot sun, it just flaskes off.

when i do wingtips, leave a lot of excess material and just pull hard on it, and use a heat gun. for the trim, i would say use a heat gun also. some desings on wing tips just don't work well, well that's in my case, so i design something else.
that monokote trim stuff isn't good for anything round, only flat surfaces.

use good heat, and when applying, just pull it good and tight.

good luck

GB