One question is why was the sticker put there in the first place. Perhaps there is substantial wear underneath. Still, I agree that the sticker is awful and even a substantially worn playfield might be preferable.

Well, you do have a poll asking if you should remove it . . . .

No. I’ve never done it, but there are plenty of threads on pinside about the heat vs freezing methods. I don’t think there is a consensus.

Good luck! And be sure to post pics of what’s under there.

I would try heat first myself.

That playfield needs some TLC. All that applied red is at wear areas also. First thing I would do is give it a good cleaning and see what I'm up against.

Are you ready for the work needed if you peel this up and it’s a horrible mess under there? Maybe there’s terrible wear and gouges or something. Maybe it’s fine.
This is a huge gamble and if you peel it off you’re committed!

Here ya go...just buy this. Problem solved!

https://pinside.com/pinball/forum/topic/used-balley-lost-world-playfield

Check google, youtube, and pinside for articles on "Mylar Removal". Same principle. I'd recommend the freeze spray method. You can always practice on an old car bumper sticker, or anything really with stickers on it.

I would rather leave the decal than see bare wood

Get your wife's hair dryer, put it on hot, and start heating the area where you already started peeling up a corner. Put the nozzle of the hair dryer only an inch or two away from the surface. It needs to get HOT!
As the sticker gets hot, slowly start to peel it back further. Don't rush. Make sure you are only peeling after the glue is quite hot. So hot that you might actually want to use needle nose pliers to help hold the corner of the sticker when you are peeling. Continue heating and peeling, sweeping the hair drier back and forth over the area to be peeled. It will usually come off without any problems and remove little if any paint, except for paint which was already loose in the first place. Clean up the glue residue with lighter fluid and lots of rags, and then get ready for a massive touch up effort to correct whatever the sticker is hiding!

PS Every time I have tried the freeze spray method, massive amounts of paint get destroyed. I'll never do that again! YMMV.

You'll probably be left with an arrow shaped area of bare playfield but that beats the ugly putting green right in the middle of the game. You've got to hand it to whoever put it on in the first place, they tried to make it look somewhat artistic.

That doesn't look too bad. Whoever did it has put in time and effort. Leave it there as you will likely cause more damage removing it and it's likely underneath is poor.

Nice! That’s far more preferable than the sticker.

You could touch that up easily with little bit of testors! Looks way better than the green decal!!