Cool, sounds like we may be onto a winner, i had no idea what it might (or might not) do to old playfields.
I've had the job of pulling apart all kinds of junk over the years, especially collectible bikes, skateboards toys all covered in old stickers and goo.
Time and Time again, i found that Eucalyptus oil absolutely left Alcohol and other chemicals for dead....
If you look thru any old home-hints books, they practically recommend using Eucalyptus oil for just about everything, whitegoods, furniture, plastics scuffs, stains etc....
A 10minute job with alcohol is about 1 minute with Euc-Oil, and obviously a 1-2 hour job with alcohol is somewhere around 10-15mins with Euca-Oil.
Obviously you'd want to be careful and try it first before ruining your item(s) to be cleaned.
Good Luck!
