I've tried many primers over the past few years, several I liked but had issues for my use. Some required decanting for A/B, some had adhesion problems, several smelled terribly, some did not sand or fill well.
I have settled on Stynylrez, it does it all well for me. Never had a lifting problem when removing masks or sanding, levels perfectly, dries super fast and with a durable surface' It's workable within a few hours of spray, but as a matter of habit I wait overnight.
One caution to new users, the solids do settle rather thickly at the bottom of container. Nothing new about that, it's a fact existing since paints were placed in jars. But stirring with a stick is really the only way to get a thorough blend of all the ingredients, shaking only results in a watery mixture, a portion the desirable and workable qualities of the primer remain at the bottom. After stirring I then use the Badger mixer to complete the process of blending, or shaking does it too.
Hearty recommendation for Stynylrez from me. Thanks to Ken @ Badger for producing a great paint product, and some mighty nice airbrushes.
Patrick