Okay, I admit to years of abusing my guitars with Pledge and other furniture polishes until finally discovering Martin Guitar Polish. It does a superb job of cleaning (not just polishing) older instruments especially. It even removed magic marker from an old mahogany ukulele! (Don't ask why anyone would write on a ukulele...)

For those of you that happen to own an "X" series Martin guitar (like the reviewer above who accused this stuff of ruining his guitar) or a satin finish guitar, do not use this polish. The X series guitar are a wood fiber (i.e. fake press wood) Textured Finish (HPL is a High Pressured Laminate—like Formica with a textured finish—not real wood). So for him it's like using wood polish on fake plastic wood—get a real wood guitar. I use this polish on my Martin 000-28 (solid sitka spruce and indian rosewood) and it is perfect polish for it. Most times I use warm water and damp cotton cloth. When I change strings I hit it with polish.

This product sucks!!! It ruined my beautiful Martin DCXE Black!!!! This polish made its beautiful black finish fade!!!!!! If you have any guitar with a high grade laquer finish, DONT USE THIS PRODUCT!!! Warm water is better than this!!

I use this polish on almost all of my guitars. Including several non-martins, this polish works like a charm. It is good at cleaning the wood and it gives it a good shine