and for the WIF private key I'd have Kw**********jcQmKRPNTF8CU9H1thzC981DCrZgmS4m8ygXFCEk (this is just an example, no funds are here)
Is the paper missing after Kw or is there enough paper for some letters, so that the chemical analysis would help you to recover some more characters to make the calculation easier?
For example:
Kw
**********jcQ...
** -> paper / chemical analysis / recover characters
****** -> hole / no paper
-> so you would have 6 missing characters
the paper turned to mush. There is no hope of any kind of analysis.