i think what u could do is . print out few pages of thouse stencils . like 5-6- pages different kinds cut out what u want and tape them together and ur golden ... i think i might try it out tomorow just to cee if it will work ;)
try this .. thats how i will do it but with a high low pressure sprayer gun.. ill keep it posted
https://www.youtube.com/watch?v=yg3_UvZeeOs
https://www.youtube.com/results?search_query=camo+painting+boat&search_type=&aq=f