What I used for this scheme is very simple.
Krylon Fusion Camo Khaki
Krylon Fusion Camo Olive
Chaos Black paint.
Blu-tac or masking tape
Gouache (as I show in my gouache tutorial (check my channel)

The nice thing about the Krylon fusion paint is that it works exactly like a primer. And if you buy the ULTRA FLAT varieties you can paint over it easily with whatever you have (If you get the gloss variety of paints, the paint will not stick to it properly)

Steps:
1. Basecoat the tank with the color you want the stripes to be.
2. Mask off the stripes where you want them using tape/blu-tac
3. Spray whole tank again with the second color
4. (Optional) If you want a 3rd color of camo, mask off more and repeat step 3
5. Remove masking material
6. (Optional) paint black lines between the camo paterns
7. Paint your details as you want them
8. (optional) follow my gouache tutorial to add shading to the armor plates (it looks good without)