this is my 91 Olds Toronado'* rear bumper facia. This has occurred over a period of years. It won't wash or wax off. It looks like mold.
Any ideas how to get it off?

You would need to sand it out and refinish.

that'* kinda what I figured.
Thanks for the help.

Hey guys,
I thought I'd try something since I have nothing to lose if it doesn't work, and I could just re-paint it.
So I put full strength bleach on a rag and wiped it on the bumper and to my surprise it worked!
A few days later the area I put bleach on



had no mold.
I did the whole bumper and it looks great! No more mold.
It looks a little dull but I'm gonna see what a good polishing will do.

Thanks for updating us on what you did, it looks great!