I'm missing something about the effects of permanent Rot on a mutant.
So mutants get Rot through various means (environment, pushing powers, etc.). They can lose them through rest and decontamination (bathing, etc.). Whenever mutants are going to lose temporary Rot points, roll to see if they instead become permanent.
There are 10 checkboxes for Rot points. I imagine that the permanent ones are filled up permanently, and the temp ones are erased when they're lost.
What happens to a mutant with 10 permanent Rot points? Aside from breaking the "Rot Eater" ability, it seems like there's no mechanical down-side. Does the mutant become a potential source of Rot for others? Do they die? Are they somehow weakened?
I've pored through the book several times (and done keyword searches in the .pdf) and can't find anything on the subject.
@jasondurall: There is no direct effect from having permanent Rot Points, but every time you take a new Rot Point, you must roll one die for every Rot Point that you have (permanent or not). That is - the more permanent Rot Points you have, the greater the risk is that you will suffer damage when taking new Rot Points.
@BryanGustafson: There is quite a bit on information about the Zone Ghouls in the core book, both in Chapter 13 (pages 175-176) and in Chapter 15 (The Special Zone Sector "For a Mouthful of Water", starting page 201).
@jasondurall: Yes, theoretically there is no upper limit. However, getting more than 10 permanent Rot Points would be extremely rare - the Rot (or something else!) will probably have killed you before getting that far. :)
Jason - every time you gain a rot point you roll your total rot points as a base die pool with every bio hazard symbol coming up causing a point of trauma. If you've got 10 rot that means you'll probably take 2 trauma every time you are further exposed - your life expectancy just fell below that of a mayfly ;)