It took me about 2 hours to mask off these curved pinstripes... ...and times two on that. I love this part, where it seems impossible that this process could work. But the process does work - such clean lines.  There is some under-spray where tape lifts, but a razor blade cleans that up nicely. Onto the side bumpers.  Not shown is that I taped off the frontal ear portions too. Pretty much bulk-masked the whole helmet, as the angles required to airbrush all of this results in lots of overspray. Starting to take shape, isn't it?