And some more tips for well...the tips.. of those Z650-750 needles. I use cellophane tape to mask-off the tips, other tape is too thick and will leave a ridge of paint behind. I use an initial cleaning of goop hand cleaner but any dishwashing solution would work of course. DON'T remove the left-over original paint, just want it clean. Then finish masking-off remaining sectors and spray in lite coats to build-up that color. I've favored the Krylon Fluorescent Glowing Red Orange for years but hard to find now, it's retro and expensive if you do find an old can of it. The superseded version, still available works too. Hopefully Richard is watching, info might be Helpful!