I use a product called "Parks Furniture Refinisher" available at the
Home Depot and maybe Lowes also.  "Furniture refinisher" contains
alcohol, acetone and other solvents.  It works great!  There are other
posts in the MMD Archives where people have recommended other
techniques for removing PVC-E which they have had great success with.

I use PVC-E adhesive for gluing new plastic key tops. Sometimes the
keytops get damaged through trimming and other handling so removal of
PVC glue from the key is necessary.

The trick for cleaning excess PVC-E glue from the top key surface is
denatured alcohol.  Denatured alcohol easily removes the excess PVC-E
glue and will not adversely affect the plastic surface.

I use PVC-E glue for many repairs in the field.  There are instances
where fast tacking, more flexibility, faster drying and sealing is
required and other adhesives will not adhere as well.  When I need to
restore a vintage instrument as original and to be historically
accurate, I don't use PVC-E glue.

Most of the time I work on what many of you would consider junk, which
is why I need my PVC-E glue.  I feel almost the same way about my PVC-E
glue as Charlton Heston does about his gun: "You will have to pry it
from my cold dead hands," said jokingly :), sort of...

Bill Maguire