Neogenic Nightmare Chapter 8: Duel of the Hunters - S2-E8
Other mistake: After falling down the cliff and getting blasted back by his van's explosion, the Punisher shows no signs of injury. This kind of fall combined with explosion should have killed him, or at least injure him very severely, as he is a normal human without any superpowers.





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