I've printed red & yellow-green chevrons for fire trucks before.
I use 20,100,100,20 or 10,100,100,10 for my red and 30,0,80,0 for yellow-green. I print it on one of our mimaki c/jv150 from signlab 10 on a photo-bidirectional (16 passes/inch roughly) profile.
One tip I do too is after I...