I have a machine that had a overlay on it with a nice tear on it. I was successful at removing the overlay using a cold air duster, but then I ran into a thick layer of sticky wax I originally thought was the adhesive layer, but realized it was a thick layer of wax; not sure why they even put the overlay on to begin with? I originally tried Goo Gone, but that stuff was worthless and I found the best method was to use the cold air canister with a credit card to remove the wax. It did a good job for the most part and didn't damage the playfield, but now I am left with the remainder of the wax that won't come off or is imbedded. Not sure what I should do? Was wondering if I should try a wax remover substance or just give up and wax it and call it good?

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Is that the right stuff? Notice the cloudiness on the playfield from the remaining wax?

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I'm pretty sure it was a thick layer of wax because it was also where the overlay wasn't. I got what I could off but no chemicals worked, including Namptha.