Wot Phil H said!
I've used this recipe & it does work.
One gotcha is getting the mix right twice, so mix more than you think you need!
I mixed enough for a satin finish & sprayed away on a small plane, sometimes putting what I thought was too much on, but it 'self-levels' IF you are carefull.
Don't try to cover ehe entire plane in one go, eg, do top, then let set off a bit, then do the sides, then the underneath.
& ALWAYS use a MASK & Ventilate well, got a spray booth?