Gold Supporting Member
- Feb 20, 2013
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Thanks !!! this explanation was very helpful ..One more detail which is also important to take into consideration.
Poly is a finish that cures (meaning, there's a chemical reaction and the cured substance is no longer the same chemical composition that the liquid finish once was), but nitro is a finish that never cures (i.e. the solvent evaporates and the solids stay on the surface).
So, many have noted in the past that nitro is "alive" which means that it can change over time, depending on what chemicals it comes in contact with, over time (note that everything is a chemical, so I am not referring exclusively to harsh chemicals).
So, the part of the finish that is always in contact with perspiring skin, such as the lower bout on the bass side, is not going to be the same kind of finish that will be on the treble side, over time. This is important when cleaning and detailing vintage guitars. If we use a harsh cleaning product, such as the Music Nomad Guitar Detailer, we might be surprised to see that the part that was constantly rubbing against the skin turn into a dull, frosted appearance, right after cleaning. That's because the nitro, which is "alive", changed over the decades, as it reacted to the acidity (or whatever) coming from the skin of the player's arm.
One has to be careful when deciding which cleaning products to use on vintage guitars, with nitro finish. They don't all age the same way and it also depends whihc formulation was used in the first place.
That said, in my experience, we should be fine using the Music Nomad Guitar Polish, on sticky Gibson necks, to make them slippery. But if it's a very old Gibson, I don't really know, as results may vary.
Hope this makes sense and hope this helps.