Need some input from a Vallejo user. I'm trying it for the first time on my D-Day Typhoon 1b & I'm having trouble poor adhesion & it being easily damaged.

I put down a primer coat of Alclad II grey like I always do when using acrylics. First noticed the if I touched the paint with the back of my fingernail it took the color off down to the primer & now as I mask the upper color the it is lifting in small areas. I ran the tape across the palm of my hand four or five times before it touched the model.

Does this paint need to be sealed after every coat?

i think your supposed to use the black cap for airbrushing and the white cap for handbrushing

I'm using Vallejo paint a lot (about 2 years). I use Tamiya or Mr.Surfacer 500 primers, because Vallejo's primers are more useful as a base colors. Even for Model Air I always use an Airbrush Thinner and Retarder Medium. Then I always apply paint in a very thin layers (3-5) and allow paint to dry up to 2-3 minutes between applying layers. And I try not to touch painted areas as well.

Retarder is a gel, right, and it is used in a very small amounts. And what about thinner - I think that you have a "Thinner Medium", because airbrush thinner is more like water or spirit. Anyway, compared to Gunze or Tamiya paints, Vallejo has the lowest aghesion.