That should clean up very nicely....I used a TreasureCove kit on my Getaway playfield and it gave very good results (mine is in resto section here).
Re the front panel...Hmm. I would assume you're planning on decaling the machine? If so, I depending on level of damage might be too much to fill. If the coin door piece can be removed cleanly, maybe worth taking to a cabinet maker to see if they can make a new one? Or if you're handy on the tools DIY!
