This past weekend i grabbed me a heavily smoke damaged SH-1. Despite the ugly look, it works 100%!
Before cleaning:

During cleaning:

After cleaning:

I spent almost 3 hours taking the keys off and scrubbing the hell out of them. I used a total of 5 Mr. Clean Magic Erasers.
These are great synths. This is actually the 3rd one i've had over the years. The ugliest, but also the cheapest =o]