That's what I was trying to say.. the light pretreat is for the polyester and CMYK ink not white ink.normally the bleed on the high res if from the white highlight layer. just turn it down or off. my white underbase is usually sufficient and the white highlight is unnecessary and causes pooling which bleeds with the CMYK.
but to print a dark black on safety green, you don't need white ink. just pretreat and then print the CMYK layer at 1440x720 and you should be good.