I recently bought a classical Patrie guitar and I went to their website to see how to clean and take care of the guitar and the following was posted on their website:
"Do not use any wax based products on the guitar, especially on the top! This will cause unwanted wax build up over time which will impede the top from vibrating. Instead use a small amount of soap based guitar polish sprayed on a cloth (never directly on the guitar) and gently wipe off your guitar. For the fingerboard we suggest removing the strings and applying Lemon or Danish oil to a cloth and then working it into your fingerboard. Let the oil soak in for a few minutes and then wipe off the excess. This should be done once a year on rosewood or ebony fingerboards only. Doing so not only cleans, but conditions your fingerboard against cracking and keeps it from losing its luster."
Pages 1