the quickest trick to using the MM Acrylic primers is to add some Future to your mix,,,,,,,or try some Golden Medium, # GAC 200
another way is to give your model a coat of straight Future, sand it with steel wool (to scratch it up), wash it clean, then spray a thin coat of MM primer over that
I just did a side by side by side test with MM primer over Future coat, MM+Future mix, and MM + Golden,,,,,,,,all three stood up to the "burnished Blue tape" rip off adhesion test
I still like the Vallejo large bottle gray primer mixed with Golden 200 better, though
Rex