Laminating required documents? Airworthiness Certificates, Registration Certificates, Radio Licenses, Medical Certificates, Temporary Airman Certificates and other important documents are commonly printed on paper, which can be easily damaged or destroyed. Replacement can take weeks or months, grounding the plane or pilot unnecessarily.

Is there any regulation (or other general legal principle regarding official documents) that prohibits lamination to protect them?  If so, is there another widely accepted solution?
For protecting non-wallet documents, consider using a vacuum seal bag for food. To prevent warping the simplest thing is to squeeze the air out and only use the seal function, without vacuum.

This way way if somebody has an issue or you need to modify the documents, you can cut open the pouch and retrieve them in original state.