There is no whiteout.
You will strike thru the error using a single line, leaving the error legible. Then amend the document with the valid information and initial the change as authorized.
You then submit the new draft, with visible corrections, to be published.
I agree with this guy.
Look into usenet, sabnzbd (or nzbget) and the ***arr programs.
Cost you a max $10/month, depending on how serious you are at hoarding, and how far back you want to go.