Reply To: Looking for some help with my Airbrush.

[mbdeyesParticipant 655xp 1]

I’m no expert, so I’m expecting to be corrected on a point or two of this, but here’s my own experience:

Most whites are very ‘chalky’. They have a tendency to dry and clog faster than other paints. It doesn’t seem to matter what brand. Greys can also be like that.

If your paint is not adhering at this point in the process, it’s not the model that’s the issue. It’s either the primer or the paint you’re using. The effects around the rivets look like pooling so it’s possible that, at least for those sections, there was too much wet paint applied, or the airbrush was too close to the model. It’s going on ‘wetter’ than you want.
As for the speckled pattern, again, you’re going to get that more often with whites, I believe for the same reason they dry and clog faster. Environment and other factors can affect all of these things.

There’s a few of things you can experiment with. Try increasing the PSI, might help with the clogging, but pull the airbrush back some as well. You’re not doing detail work so no need to be careful with overspray, etc. You can get lubricant for the needle. That will help with ‘dry tip’ where the paint dries on the needle.
To cover the model in a way that avoids some of the pooling and speckling, try multiple very light coats.

All of this, of course, takes some patience.