It's the wrong style of door.

The US style on earlier WPC games has a set of coin slots centered on the door.

http://www.ipdb.org/showpic.pl?id=20&picno=38592

Unfortunately, that coin door is hard to find, and new replacement parts haven't been made available.

image-32 (resized).jpg

The glue might be able to be removed.

Which coin door do you have, exactly? Can you post a photo?

Do you have the two-slot coin door like I posted above? If so, you can just replace the plastic parts.

I think this is it:

http://www.marcospecialties.com/pinball-parts/27-1026-3

And for the reject button:

http://www.marcospecialties.com/pinball-parts/27-1037
http://www.marcospecialties.com/pinball-parts/27-1038

That's still the wrong style door for early WPC games.

Yeah, those were for installing a plate to cover one of the coin slots. I've seen that done to a lot of coin doors, unfortunately.

Cosmetically.

Why are some people even bothering to take out the foreign door that looks "wrong" if you're going to only put in another "wrong" door to replace it? That doesn't make sense to me.