Alternatives to Ultramarine Blue: Army Painter Primer?

I've been plagued with cans of Ultramarines Blue spray paint that just don't work.  I must have ten cans of this in my garage which are mostly full, yet they refuse to spray and I can't come up with a solution to breathe some life into them.  As a result, I've had to find a…

Dark blue. The colours are matt, making your freshly sprayed miniatures or models ready for basecoat almost right away. Sculptor: N/A. Shake for

Army Painter CP3022 Ultramarine Blue (400ml Can) Color Primer Spray

Explosive Speed: Unleashing a Rapid Ultramarine Painting Frenzy!

The Army Painter Warpaints Review for Miniatures & Wargames Models - FauxHammer

First look: Speedpaint by The Army Painter - better & cheaper than Contrast? » Tale of Painters

The Army Painter Warpaints Review for Miniatures & Wargames Models - FauxHammer

Citadel Contrast Paint: Ultramarines Blue (18ml) – Warsenal

Colour Primer Spray (400 mL) - Ultramarine Blue

First look: Speedpaint by The Army Painter - better & cheaper than Contrast? » Tale of Painters

Army Painter Primers