A friend had this machine in his garage. We elected to restore the machine and keep it. Upon further investigation, this was not going to be a simple restoration. A squirrel decided to call this cabinet home. It comes completely furnished with insulation, feces and chestnuts.
Nonetheless, we are donning the rubber gloves and saving the table from the junkyard.
Tonight we will be taking a vacuum to it and seeing the extent of the damage to the bottom.
Any tips (other than throw it in the garbage, burn it, etc.) would be appreciated.

40 hours of work so far
Progress update #1 (6 man hours)
https://pinside.com/pinball/forum/topic/dragon-interflip-distaster#post-3526924
Progress Update #2 (20 man hours)
https://pinside.com/pinball/forum/topic/dragon-interflip-distaster#post-3530529
Progress Update #3 (14 man hours)
https://pinside.com/pinball/forum/topic/dragon-interflip-distaster#post-3531993

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Well, we took a hearty stab at it tonight. We spent a solid 2 hours (3 people) removing solidified, frozen feces from the bottom of this machine. All of the contacts connect to a rail with pins to hold them in. This minimized the cleanup effort greatly. I am so grateful that most of the components are easily removable.
We found a few of the wires chewed so far but this is better than we expected. The mess came off the bottom of the machine SURPRISINGLY well. I think that is because it is -6C here. Most of the big stuff is gone. We will get to vacuuming it and disinfecting it on Saturday. (We will have the whole day to work on it!)
That last picture is the beer kill count so far. ( it would have been more but we were wearing masks that prevented our consumption.)

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26hrs of work so far.
Today we managed to take the backbox off. In doing so, we pulled the machine away from the wall and found a few things of note.
1. More squirrel finger paintings.
2. A LOT of damage to the bottom of the cabinet.
3. Bent legs

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We also took off the bottom thanks to all your suggestions as well as the play field.
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Most of the large debris has been cleaned up and we are attacking the rest with simple green. Not being in an insulated/heated garage means frozen cleaning product and rags. The progress on cleaning the bottom board was really slow due to that.
Here is a before and after of the cabinet, that is as clean as we could get it. We are going to try to paint over the non playfield visible parts of the cabinet.
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Found the counter! The lid for it is broken, but I'm guessing the play count is 6930.
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The play field and underside look excellent. Everything is still shiny looking with very few chewed wires.

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We were also just looking for some tips on fixing the damage to the back of the cabinet. There doesn't seem to be any veneer, just paint on particle board. There is no swelling at all, just chunks missing (about 1/2" deep in some places) Should I use plaster/bondo/wood putty?
Does anyone have rubber ring sizing? I have figured out most of the sizing myself so far, and am just a little bit hazy on some of the bigger sizes.