Neogenic Nightmare Chapter 7: Enter the Punisher - S2-E7
Other mistake: Spider-Man and Detective Lee both comment on the skull on the Punisher's shirt when they first see him. However, the Punisher is wearing body armor that covers most of his chest and abdomen in this scene, so there's no way they would know that he has a skull on his shirt.






Answer: I believe it was just a way to try and show the suit is "oily" or reflective. It also helps define the character's features since otherwise, he'd just be a flat black color. It's similar to how the black suit Spidey had blue outlines. (I don't know why they chose a pink/red color... maybe because red is associated with power/fire/war, so it's a more "evil" color?)
TedStixon