Plastic Coated Guitars

Why do guitar makers use a poly finish?

It lasts longer. It wears better. It doesn't crack. It doesn't annoy the AQMD or the feds because of VOC emissions. Its cheaper to manufacture. It doesn't affect the tone at all. It looks better.

Do you know which ones of the above are true?

Well some of this is obviously true. As far as what is not obvious, or clearly a matter of opinion, I beg you to figure it out for yourself.

In my opinion, a nitrocellulose lacquer finish can look and sound better than poly. A near natural or light oil finish might be the best of all for tone. Actually no finish at all might be the best for tone. Of course the tone is really subtle, but from my experience a heavy finish kind of kills the wood resonance. Nitro has a chance to be lighter. It seems more organic (actually its like liquid wood). Of course the guitars I have experienced the nitro finish on are either recent customs, vintage guitars, or vintage re-issues, so a lot of what I am hearing could be in other things in the guitar. I also have one poly guitar that sounds pretty darn good, but I am guessing it would sound even better with a nitro finish.

Of two tele's I have, the nitro one sounds better, of course it has a lot of mechanical differences as well, so its hard to nail down.

I think a good nitro finish looks better. Its not as clear, it yellows with age, it looks "vintage". Of course a cracked faded or yellowed finish can look sucky too. So can a nitro finish on a guitar that cracks up because you opened the case it the winter after having it the back of your car. Oops.

So just remember when somebody says there are no real tone differences between nitro and poly, I think they are completely wrong. But it takes more than nitro to make a guitar sound good.