Mold Removal:

I would use a bit of white vinegar on a towel to remove the mold. Next I would apply a plastic/vinyl, and rubber protectant such as 303, which is a product name. This product is usually only available in RV supply stores and at civilian airports. You can google '303' and find a retail store near your location.

 

Thanks for the info Bob. I've got the same issue.

 

...the smell is not pretty but a diluted mix of water and bleach will KILL mold and mildew...try either recommendation in a small place first to see it work

jetfuel...BTDTFT...

 

Plain rubbing alcohol (isopropyl) will kill most molds too. It's gentler and less likely to cause discoloration than bleach. But, as Jet says, whatever you choose, try a small spot in the least conspicuous area as a test before treating it all.

 

Sure it's actually mold? A lot of things will discolor the black trim; whatever you use to clean it, use some Back to Black to revive the color anyway.

 

I can almost guarantee you that it isn't mold. It takes a lot for plastic, even textured or matte plastics, to allow mold to grow outside in the elements. I have the same issue on my Smart's door handle and window trim.

I'm 90% sure that it's simply discoloration of the plastics. My Saturn had black plastic on all 4 doors along the B-Pillar, and on all 4 trim pieces, the glossy coating was wearing off, leaving the matte unfinished plastic underneath exposed.

Take a look at cars like the Pontiac Aztec or Honda Element that are covered in black plastic. Even the older Saturns or Jeeps with black bumpers. They either turn all sorts of lighter grey, or they expose swirls and other imperfections in the plastic. Some restorer for black plastic trim is probably all you (we) need.

 

I use Armorall on the black trim. 303 does the same thing.