I have stains from bloodworms that have kind of baked in to the paint on my boat; there are a bunch of small spots I missed when I did a quick wipe down about a month or so ago. I was told to use FSR, I think that is the name of it, but when I was at West Marine, the sales person told me their brand was about the same, it did nothing! I used a Brillo pad on a small area and that seemed to work with some elbow grease, but I am worried it may scratch it up, any ideas? Thanks...Don