Paint a plastic night goblins is a real challenge. Models are good, but the details are not many. At this point you just have to play with color and fantasy, perhaps adding squares and flames... But it's not enough! To reach the right "goblin aggressive attitude" you have to go at least for 7-8 phases of green on the skin (and hands). Do not forget the nails and be careful with all the metal/wood details. Another important thing may be purple lips, or red-purple nose to get more "bad boys" effect. If you want to impress your friends, add some more details like colored tattoos or patches on the dress. Work a lot on shields. ...And please, do not use a magnifying glass!