Reddit mentions of EcoTools Flat Foundation Brush Made with Recycled and Sustainable Materials Cruelty Free Synthetic Taklon Bristles Aluminum Ferrule Recycled Packaging

I've cosplayed Marcaline and had my (ex)bf do Marshal Lee so I can definitely help!
Snazaroo Grey Face Paint for all over color. You get a cheapie Foundation brush and dip it lightly in water, then brush the paint, then paint cho face!
The makeup you cannot buy traditional powder makeup and use face paint with. It's difficult to get it to go on evenly and doesn't blend AT ALL. I would suggest contouring with another face paint like pale blue
The two eye products used in the video look to be a cream eyeliner in black
and Blue liquid liner

you want a flat foundation brush, not a kabuki brush. this is the one i usually use, cheap and easy to find in any drug store.

here is a little demo on my arm.

Sure thing! Step-by-step, comin' at you.

1. Make sure area is clean and dry. Put face moisturizer on it and let it soak in.
   
2. Put primer on, not just on the marks but all over the area. This is actually an important step because sweat and clothing are going to be working against you all day so having primer on there will help the makeup adhere to your skin mo' betta. And it'll just look smoother.
   
3. Put a color-correcting concealer on. I used green, but yellow would probably also work (green cancels out red tones, yellow cancels out purple). Put the color correcting concealer ONLY on the marks, not the surrounding skin (aside from a little bit of blending so the edges aren't too sharp). I used this flat foundation brush, but fingers might work as well.
   
4. Put on your normal, skin-tone concealer. Apply this directly on top of the color correcting one, and also into the surrounding areas to blend it. I used this brush to stipple it on. She can look up youtube videos of how to stipple, but it's basically just bouncing the product onto your skin.
   
5. Brush on a thin layer of translucent powder. This helps set the first layer of concealer so that you can pile on more layers without them muddying or blending together, since you want to create a layer effect and not a puddle of concealer. I used this powder and this brush to do so. Any translucent powder and large brush will do the trick!
   
6. Repeat step #4!
   
7. Then repeat step #5!
   
8. Use your normal foundation and stipple brush for a final layer that should be pretty seamless with the rest of your skin.
   
9. I chose to do a final layer of translucent powder, but that's because I live in Southern California and it's hot and I need to be prepared for the gym. I'm sweating a lot of the time. She could probably go without.
   
   Good luck!

Start with these three simple things:

1. Liquid Foundation (https://www.amazon.com/Maybelline-New-York-Foundation-Packaging/dp/B001Q8568G/ref=sr_1_3_s_it?s=beauty&ie=UTF8&qid=1466479185&sr=1-3&keywords=liquid+foundation)
   
   
2. A brush to apply the Liquid Foundation (https://www.amazon.com/EcoTools-1202-Flat-Foundation-Brush/dp/B001KYVOJQ/ref=sr_1_13_s_it?s=beauty&ie=UTF8&qid=1466479200&sr=1-13&keywords=liquid+foundation+brush)
   
   
3. A powder foundation (https://www.amazon.com/Maybelline-New-York-Poreless-Porcelain/dp/B00PFCSNWK/ref=sr_1_1_s_it?s=beauty&ie=UTF8&qid=1466479234&sr=1-1&keywords=powder+foundation) and this includes a pad brush inside of it.
   
   You apply the (1) liquid foundation to your face very evenly with (2) the brush (especially around your eyes) and then 'set' it with the (3) powder foundation by just tapping it all around your face until you can't see any of the shine from the liquid foundation anymore. Good luck!! And welcome to the makeup club; you're in for life. :P
   
   P.S. it's called a 'foundation' because it's meant to cover up your whole face and make it look perfect. Once you get good at this, you can move on to more fun things but this will make you look nice :)