Jon,

Two methods I've used with good success are 1) use 1/16 auto pin striping tape from an auto paint store. NOT from AutoZone, O'Reilley's, Walmart, etc. Get the genuine stuff from a paint store and it will set forever after it cures a day or two. Does not need to be clear coated. 2) cut 1/16 strips from a low heat covering like econokote. Use the monokote striping tool and you'll have better luck. Be careful when applying not to use too much heat or you'll stretch the stripes and end up with a curved line. Both methods have worked well for me.

Good luck,
Paul