KevinC
Well-Known Member
I would contact the manufacturer. Diesel soot is pain. I was rafted up a few years ago with a buddy with a 560db and his genset exhaust exited right near where I had my dingy tied off. I used spray Nine and a stiff brush and I think the stains are still there 5 years later.
The manufacturer does designate it as suitable for Hypalon (https://boatcleanerpro.com/) and it does work. I have used it personally and sold it locally for a couple years now.
-Kevin