i prefer to chase all the threads rather than plugging all the holes. i have plugged the holes in the first couple of frames i sprayed. after riding it the first few times rust started oozing out of the holes that i did not use. now any of the frames i spray i do not plug the holes and only chase the holes that im going to use. no more rust oozing after time and the unused threaded holes dont stand out as much because the powder gives a nice rolled edge into the hole.