One thing I've noticed while puffpainting my spidey suit is that if you're doing the red honeycomb details, it's really easy to get rid of any splatters or mistakes as long as you act quite quickly. Whenever I got an air bubble or splatter I used Q-tips to wipe the paint off. Very important though, don't just drag it along the mess up to wipe it off, I use a special technique but it's a bit hard to explain. I pinch the Q-tip between my thumb and index finger and I roll the Q-tip between my fingers as I wipe the paint off. It makes the Q-tip wipe it off without smudging more paint onto the fabric. Ik, sounds weird. Anyway, I just repeat it a few times and once dry there is no trace at all. This is on red lycra however, so I'm not sure how it would work on dye-subs.