I've been a big F1 fan since around 1975. Been to races in US (4 locations) Canada (2 locations), Brazil, Argentina, Britain, Germany, Austria, and France.
Those are actually called blueline prints - true blueprints are solid blue with white lines. Your prints will fade rather quickly if hung on a wall and exposed to constant light, especially sunlight. Because they are beginning to discolor it looks like it is time to take those to a copy place with the capacity to make large prints, either for archival pupose or for display.