Cleaning rust stains from gelcoat

[Brando]

Magic erasers work great for me.
https://www.amazon.ca/gp/aw/d/B00CH...amine+foam&dpPl=1&dpID=514y2JRAJGL&ref=plSrch

 

[Oceanmaster]

Go to the pharmacy and get oxalac acid crystals, mix up and put in a spray bottle works great! It's the same stuff in FSR just a fraction of the price.