Hi Nino, I’m finally gearing up to paint the cosmic princess.  Been many years since I repainted a cabinet. I’ll be using automotive acrylics in a gravity fed gun. Would I be correct in saying I would need less than a litre of base coat and about 250ml of colours? I’m guessing you never clearcoat your solid state cabinets? Is there much of a ‘lip’ left when the stencils are removed or do you try to only apply minimal colour coverage?

Remove the stencils within 5 minutes. My rule is to remove the stencils immediately after I've cleaned the gun.

1 Litre should be fine for base coat. That would be a mist coat, and 3 thin coats, building up to the sheen required. If you are painting the inside to the floor, you should JUST make it. Do the outside first.
250ml for the red will be fine. You may need slightly more for the yellow.

for the stencil colours - Go thin coats to the point where the colour is 100% what you want and not a drop more. Do not go heavy just to build it up. I do a mist and thin two coats MAX.