I've painted canopies before by masking and spraying. It's not easy to mask around a curved surface. Here's another way to do it with smoother results than hand brushing enamel paint.
You'll need three permanent Sharpie markers - Ultra Fine, Fins and Broad chisel pointed pens. If you don't have a steady hand you might have better results by masking and spraying.
Draw an inch then lightly scribble on some scrap paper to keep the point clean and the ink flowing. These ultra fine points can dry out quickly.
After you've used the ultra fine point for the outside line, switch over to the fine point pen widening the black line towards the center of the canopy.
Move to the wide chisel permanent marker to fill in the rest of the canopy.
Take the nose cone outside into direct sunlight to see if you have good even coverage.
If you end up with a rough spot where the ink passes have overlapped and have a raised line, sand lightly and ink over again.
This canopy inking only works with permanent black inks only. Don't try other lighter felt tip colors.
It all depends on the "trough" depth around the canopy edge. If it is shallow the ultra fine tip might slip out when doing the initial outline.
EDIT: I just opened up the Estes Puma kit. The edge trough isn't as deep as the canopy edge on the Nemesis nose cone. So keeping the ultra fine Sharpie in the edges of that nose cone won't be as easy.
EDIT: In a comment (below), Naoto Kimura mention problems using clear coats over permanent marker ink. The ink can run if a clear coat is applied. Don't apply a brushed on Future acrylic coat over an inked canopy.
I don't use overall clear coats (brushed or sprayed). I only apply a clear coat over decal area surfaces using a Q-tip. Overall acrylic clear coats get very sticky in humid Summer weather.