Good morning,
in the video tutorials by Maestro Paolo Ferrarelli regarding the checks and adjustment of a grand piano before a concert, he suggests using a spray lubricant under the key pins after removing the keybed. Now, there are many lubricants (dry, teflon-based, etc.). Is it possible to get valid commercial names for these products or an exact technical data sheet? Personally, I have some teflon lubricant, but I have never used it on the action because I am not convinced: it leaves that white patina (teflon) and feels too oily to the touch. Even common WD40 has never inspired confidence in me as a product. I prefer to remove the keys and use teflon micro-powder on the pins, an operation which is obviously not always possible because it is costly in terms of maintenance. Thank you and have a good day
