Thank you Sean and Javi. I contated Brian from Image Armour and also Brothers tech support. Brian and Brothers had similar responses. At this point there is no pretreatment able to print on polyester with white ink underbase compatible with Brothers inks. I don't know about other inks from different manufacturers.
I printed the black (30) shirts, 3 locations using Hanes Nano's. They came out very nice, customer was happy with the results and quality of the shirts. I also printed over 30 shirts, reds, yellows, greens and other assorted color. The images was just black ink on Gildan's 200. The first 2 I didn't used any pretreatment and they were Ok. Black was good black. I tried the DTG pretreatment on one and it came out much nicer, deeper black and almost not fibers if any from the shirt showed thru. I pretreated the rest. It added a little more cost to the job and I will absorb it but will show the customer the difference between both processes and if customers agrees will charge accordingly on future orders. I don't know if Brian can send small sample for testing but he claims Image Armour will blow away the competition. I may try his product when I am finish with the DTG pretreatment.
Thanks again
CD