Hey man, congrats on the splash, looks like a great day with a great family. Glad she floats!
Now, looking at the exterior of your boat, I would try a spot with the heavy duty 3m compound, a small area. Buff it until you see the green come off on your pad at least.
Now that being said, your boat is heavily oxidized and the green is one of those colors that may benifit from wet sanding instead of compounding first. Try a small spot with some 800 grit sand paper then 1000, then 1200 and I bet it makes short work of it. You can get some sand paper at auto zone or pep boys, etc. make sure its for wet sanding. I would not get more aggresive that 600 at the most. But would start with 800.
Getting the stuff off the rails could be tricky, if it s resin, you should be able to just pick it off. The rest of the stuff glue, foam, etc I would stick with some acetone repeatedly until it comes off. You will never hurt the cured gelcoat with acetone, so soak the stuff down good and see if it works. Good luck.
