I was unfortunate to have a vintage brochure ruined by blue pen ink marks and I am wondering how to remove them without damaging the brochure? Your help and advice would be greatly appreciated.
Have you tried pure acetone? It's often found in art/office supply stores (to thin rubber cement, renew markers, etc.) or sold as nail polish removers (read the label to make sure it's pute 100% acetone). Be careful, since it may ruin the brochure, depending on the type of ink originally used to print it.