Charlotte Tilbury airbrush flawless setting spray. How do I use this stuff?

[ElleSmith16]

I took advantage of today’s 50% off sale and purchased Charlotte Tilbury‘s airbrush flawless setting spray. I have never used a setting spray before in my life and was surprised that the instructions stated to apply both before and after applying make up. I had always assumed that the face would be sprayed after the make up was applied. Can anyone give me advice on the best way to use this product? I really don’t like the feel of heavy products on my face and wondered if two coats would just be too much. Thanks experts!

[SportyGirly125]

@ElleSmith16 Sephora employee here 

you could use it before like a face primer and after or just after to make your makeup last longer.