I have quite a few.
My preferred sprayer is the Gloria plastic 5 litre sprayer. I actually fill it with 6.0 litres.
One sprayer for DFC 105 used for wool and synthetics. Boosted as required.
One for Dry Fusion.
One for Protector.
Back ups in workshop are 10 litre S/S Gloria and a 5ltr S/S with a hand spray gun.
For upholstery I use 1.5 and 2.0 litre pump up hand sprayers. One with a fan spray, one with an adjustable cone spray.
Safe and happy spraying
The Ken