The above does not apply to Nathan. That does not mean, however, that investors should give Nathan a pass. Sort of depends on how an investor stands on leopards and spots.
As for
Actually, no. Restoration of rights restores civil rights, such as the right to register to vote, hold public office, serve on a jury and serve as a notary public.
It does not restore the right to have firearms and it most certainly does not remove the conviction from a person's record or as you stated, "overrule a felony conviction."
It is also NOT a pardon, which may or may not imply guilt depending on who is pardoning and in what jurisdiction.
The word you are looking for is exonerated. If Nathan doesn't want to be a convicted felon anymore, he needs to be exonerated from his crime.