Vallejo white airbrush primer issues : r/minipainting

Help Appreciated! I use Spray Primer, but on my most recent miniature it was too gritty and clumped up. Is brushing Vallejo Surface Primer the way to go? All pictures below were

Help with Vallejo primers : r/minipainting

Noob question: is this primer ok to brush on? : r/minipainting

Air brush primer is easily scratched of model with fingernail. Advise? : r/ minipainting

Why has my Primer (brushed on) come out looking like this? : r/minipainting

Brush on primer question : r/Warhammer40k

Vallejo Premium Colors - White Primer (60ml) - Everything Airbrush

Air brush primer is easily scratched of model with fingernail. Advise? : r/ minipainting

Vallejo Surface Primer for Miniatures (Review and Tips) - Tangible Day

Vallejo Matt Spray Varnish - does anybody have similar bad experience? Smell is bad and stays for multiple days. : r/minipainting

Does this primer work on resin? : r/minipainting

Vallejo Surface Primer for Miniatures (Review and Tips) - Tangible Day