Depends on how well it's done.

The value of a restored game depends who is willing to spend the money.
There is a limit to what value people will pay too.
For example: if a nice original game is worth $1000, it doesn't make sense to put in a $700 CPR playfield and $200 plastic set and $100 worth of LED's, and $200 to restore the cabinet; plus all the cleaning and fixing boards and mechs.
The base game you started with would have to be free if you wanted to be close to the market value when done.

This is why an overlay is a good option.

No.
Best thing to do here is to take lots of pics of the original.
Then, once the overlay is on, take a soldering iron to the holes.
For larger holes, use a razor blade to cut away the excess vinyl.

Also, another tip.
Cut away all fake wood of the overlay before applying.
This helps with alignment as well as lets the natural wood show through.

Note: when sanding, I like to leave the game name an number under the apron intact.
Overlays don't usually have this printed.
If it is, it would be on the fake wood print.