How would you handle this mishap?

I was not able to locate any super clean. I did find some simple green though (it says commercial strength on the gallon).  What do you know it worked like a charm.  I did not remove all the paint.  I was able to keep the boat upright and only remove the damaged areas.  A little sanding here and there to feather some areas and back to the paint booth it goes.  No more paint pens!

Thanks for the info guys...

Based on your description, I'd strip everything off and start over. 

I'd try soaking it in some Simple Green and then scrubbing the paint off with an old toothbrush before trying anything more toxic like brake fluid or oven cleaner.

Good luck,

Mark

SuperClean is a product similar to Simple Green.  SuperClean is marketed by Castrol and is usually found in the automotive section of WalMart or at an automotive supply store i.e., Auto Zone.  I've used it many times before and it does a great job of removing paint without harming plastic.  Wear latex gloves though-hard on the hands at full strength.

hkshooter

I'd soak the entire thing in a bucket of SuperClean for a couple of days. The paint and associated mess will fall off. Use a tooth brush in stubborn spots.
Start the paint job over.

I am not familiar with SuperClean.  What is that and where do I get it?

As for the break fluid... well, I think I'll file that idea under last resort.  Using break fluid, which i have no doubt it will work, just seems a little weird to me.  But I am open to give it a shot later on.

I'd soak the entire thing in a bucket of SuperClean for a couple of days. The paint and associated mess will fall off. Use a tooth brush in stubborn spots.
Start the paint job over.

...repaint the affected area...there is no real way to remove permanent ink w/o marring your existing paint job...if you do it with care there should be no paint build-up as you are removing the original layers...

I would wipe the hull with a cloth soaked in brake fluid & re-apply every so often so that it remains as damp as possible until the paint starts coming away. If you use a cloth & keep the model upright, you will be able to strip only the areas you want.