In actual fact, While I have not tried these as yet, I am planning a build that will employ a set of these and also painting the insignia etc.
my take on these is that they work like decals, but are a wet version of dry rub down transfers that Archer make. They should go around corners and over bumps no problems, but as it says in the instructions, 6-8 hours before removing the carrier film, leaving the artwork/stencil on the model.
Maybe another snapdragon aircraft build with tutorials is in the pipeline!