Stop in for a cup of coffee

Anyone know what that blue, spray on stuff fabricators use on metal to let them mark it for welding/cutting etc is called? I see it used all over these custom car shows and they never mention what it’s called. Google turned up weird results lol
this stuff?
https://www.amazon.com/DYKEM-80300-Steel-Layout-Brush/dp/B01LZZP1VA/?tag=fabo03-20