Removing Testors Acrylic from model

I'm working on a Focke-Wulf 190D and have been studying up on how the aircraft was painted, etc. I decided to apply Testors Aluminum Plate to the model for my base coat. Worked great. Once I cleaned it up (ie, buffed, polished, etc), I applied a few coats of Testors Metalizer Sealer. Once again, worked like a charm. Nice dull/flat finish. Just what I wanted. Then, after the sealer had cured for a few days, I started preshading my panel lines using my trusty Aztek airbrush and Testors Acrylic Flat Black paint mixed with a bit of Acrylic Rust.

All was going well until I accidentally blasted the underside of the aircraft with black/rust paint. Where once I was tracing my panel lines, I had painted the whole thing black! Gak! Well, luckily, I only did this to the bottom of the wings and part of the underside--and, I must say, for a mistake, my accidental coat of paint went on nice and smooth . Unfortunately, I had planned on the wings being left roughly the same aluminum color I had started with as a base coat.

Any ideas on how to get the black acrylic off? Since it is acrylic, do you think an acrylic thinner would craze the metalizer sealer?

Thanks for any input you may have.