If you go to an automotive paint supply store, they have 1/4" painters tape and down to 1/8" plastic painters tape. We used it to start the line in really close places, and then tape on the top of it, avoiding the leading edge with paper and tape from a masking tape and paper machine.
The current 3m painters tape is green in the 1/4" size, and blue plastic in the 1/8" size today.
I like to use the 1/4" tape to cover pinstripes, if I am going to be using a strong cutting compound, and yes any tape will leave a clean line around the rest of the work when pulled off. You just have to finish the polishing, etc., with the tape off, so that the material now gets on the pin stripes, etc., and it is all even.
You will find that this 1/4" tape is easilly pulled into any kind of curve, etc., and that is how we used to make painted pinstripes back in the day before they started using stick-on pinstripes..
And waaaay before this small tape, there were guys like Von Dutch that hand painted pinstripes, etc.,using a little camel hair sword brush in different sizes.
We used to use similar sword brushes to touch up painted finishes, long before they came along with pens, markers, all that other stuff that people use today..
End of history lesson, class dismissed !! Go play outside ! No hitting, punching, tripping, hair pulling, or breaking wind !!
DanF