I have Adobe Pro 9.4.6 and use the redaction tool often. I was recently advised to print my redacted file - and then scan it back in to avoid the original redactions to be compromised. Is this necessary?
If you apply the redactions, the redaction annotations are no longer there to be removed. After they are applied, the content that was selected is removed entirely and securely. If someone claims otherwise, see if they can prove it.