look up the thread for the stripeman lettering... it is in there someplace.
I painted the tops and sides of the letters, because it was easier to get a good straight cut there. I used standard blue painters tape. It took about 1 hour per side to tape off, due to all the extremely small spaces, and cuts that had to be made. I then taped really well along all the edges, to make sure of no paint leakage., through a tarp over the rest of it, taping it down, and hit it with the spray. (standard surface prep was also done).
because the tape ends up being at an angle to the painted surface, and because primer and paint actually have a thickness to them, when I pulled off the tape, a thin line of white could be seen around the letters (I used white primer)... I had to go in and trim all of that white off.... so, use grey primer that will just blend back into the cladding.