Oh! Mr Colitis...good to see you again!

I believe that you are right in both cases. Certainly a deaf test would be more appropriate for the accordion.

In general, wet wood does not work well in making guitars. On the other hand ...neither does dry wood. This is hard to understand I know. What you have to ensure is that you have wood that is not too wet, nor too dry. Unfortunately, this delicate balance must be maintained during the lifecycle of the instrument and is also influenced by temperature, hence my advice to Robin Banks above to store both his dehumidifier and his night storage heater in his guitar case.

If you wish to slide on your guitar, I would suggest using a suitable combination of lemon oil and carnauba wax and this should supply the necessary lubricity with damaging the finish.

Yours sincerely,

Dr. Guitar