Vintage Synth Repair

Hello everyone :-)

I am new to vintage synth repair and I would love to get some advice.
I am presently repairing a Roland XP-80 keyboard and it seems the epoxy glue that holds the keyboard weight underneath the keys has broken down and dripped througout the keyboard mechanism. At the moment, I have been using methylated spirits to remove it with some sucess (takes a long time to remove - huge job!) I was wonderng if anyone else has come accross this problem and what they used as a replacement glue? Is there a better way to remove this gunk? I have tried everything but do not want to try acetone or anything similar (because of plastic)

I have 76 individual keys to do and the whole plate mechanism :-(

Many thanks

Greg