Posted By:
Tim JamesI'm not aware of any process that can "remove" a pinhole.I have 15 years exp.in archival/museum framing.There are ways however,to reverse staining from acid burn and other flaws.If the card has sentimental value I would suggest working your way backwards carefully with a dull pin to push the separated paper back together.You can also touch it up with color,but of course this a no-no with a card of value.