oh boy!!! love this kit. it keeps begging me to be built. the primer looks great. please let us know how that masking fluid works! especially once it's applied ON top of a coat of normal paint...
Once the liquid mask is dry, start painting, once the paint is dry, start peeling the mask off. I'd say it worked perfectly with zero dmg to the primer coat. The mask is water soluble, for stubborn part, just dip some water with cue-tip and wipe it off.
I missed a step here, should have made sure that the edge line was smooth when the mask was still drying, but it's not the fault of the liquid mask.