DIY hair identifier spray

I've been seeing this trend everywhere recently where you use a hair identifier spray before dermaplaning to clearly see the hairs. I was intrigued and almost bought it, but I found a DIY version where you apply a bunch of a powder of your choice. I used a powder puff to pack it on. I used colloidal oatmeal since my skin loves that stuff. It really works! But it can get messy so make sure to do it over a sink.