Is this possibility mold? If so, can it be removed?
Are you sure that you have mold?
Have you been around a hackberry/nettle/Celtis tree? If so it could be from them.
Either way try a microfiber towel with vinegar.
In your second pic. what is that in the right lower corner that looks like something pealing off? If this is some kind of coating then you may have something bleeding through.
Pamela & Mike
Kinda looks like oil.. try some degreaser and see if it comes off.. if it is mold do 10-1 mix of bleach and that should kill it.. or was it 8-1 mix..
Just a guess though
Nothing is peeling! Think that just a streak from me cleaning the area!
New to us coach, so I am not sure what it been around!
It doesn't smear, so I don't think it's oil/grease, but I'll try cleaning it again. Vinegar and water solution did not work.
Have you tried a fiberglass polish?
Or just any polishing compound.
Have not tried a compound. Wasn't sure what I was dealing with!
Will try that next.
The gel coat (assuming it is still the OE gel coat is thick enough that you will NOT wear through it with polishing compound.
I use Bar Keeper's Friend on our coach with great success. It will remove the most stubborn stains without harming the gel coat. I DO NOT use it on the decals, nor would I use it on a painted surface. But for the original gel coat, it is excellent. Powder or "soft" liquid - both work equally well.
In the Garage | How to Use | Bar Keepers Friend® (https://www.barkeepersfriend.com/what-to-clean/how-to-use/in-the-garage/)
If it is mold/mildew bleach and water will do the trick.
John
We like Clorox Clean-Up. Works really well as it's a detergent with bleach. Cleans the Corian beautifully. Leave it a stubborn stain for a few minutes and most will come out.
Keith