Have set up a form which requires two digital signatures, one by the person submitting the form and one by the supervisor approving the form. After a thirty day period, there is a section of the form which no longer applies and the information needs to be removed by redaction. My problems lies with the digital signatures locking up the form and not allowing any further editing. I have set it so the supervisor can go in and fill in their part of the form.
To that actual form the answer is no. If you flatten the page (or print to a new PDF--maybe better and keep the original) to make the signatures part of the form (of course they are no longer legal digital signatures), then you can redact the result.