I see how this could have potential, but not enough for it to be made commonplace. Every piece would have to be totally different. One way you could do this is make a few over-sized pieces of armor to put on the outside. You could make the undersuit out of orange or brown fabric fitted loosely around your body and have strips of multi-colored (red,orange,yellow maybe?) fabric hanging off of it. You could make non-toxic fake vomit and mix it with some kind of hardening agent and pour it over the armor pieces to make it last longer and not run off.
That still sounds kind of time consuming and gross, but there is still hope yet. The main problem is that all flood would be different and uniquely nasty. However you make it, I would commend you.
Good Luck!!