Re: maple necks warp without a proper finish....
i have an esquire that i made, maple neck/rw board, there is no finish any where on the guitar and the neck is stick straight after 8+ years
prs uses a poly finish but im pretty sure its very thin at least on usa models
I didn't mean to say PRS make exceptionally thick finishes, it was just a figure of speech since no one finishes a guitar as thin as a layer of moist breath. Any finish must be at least a few thousands of mm + the average pores depth. More pores mean more paint and more uneven application since pores are not identical in depth and shape.
Never heard anyone say "Gee man, my guitar sound dull, I think it just might have a pore or two too many". But lots of BS on the poly vs. nitro.
Thin coats and poly don't go together, poly is a 2-component finish and is denser than regular solvent based lacquers like nitro. You can't just thin it out with thinner because urethane polymerizes with catalytic hardener and does not rely on thinner. There are some formulations that will guide you through mixing stages, because adding too much thinner might trap it into the finish way before it evaporates completely, because hardener and urethanes already set. A finish like that will feel rubbery.
Gloss is controled with hardener overload, not matte pastes like with acrylics and polyester paints.
Nitro coats on the other hand have to be thin. It has to do with the chemistry of the nitro itself, not with the size of owner's penis. The thicker the coats the more chance to get cracks in finish the first day. Nitro is not completely solid, it will evaporate and shrink slowly over the years on and on as it is organic material and will give the surface a serious cracking patina. Cellulose was so popular back in the 60's and 70's they made all kinds of weird stuff out if it, even pup mounting rings and pickguards. These guitars now suffer from cellulose rot, shrinking and different chemical reactions that are still going on till this day.
I spent quite some time working in my friend's car body shop...
Nitro was designed for coating metal surfaces and somehow got into the guitar industry. Poly is purposely designed for woods but somehow Their Highness The Tone Crowd seem to dislike it for no reason. If you are really bothered with the finish on your guitars, shave them down to bare wood ffs and you never need to worry about finish killing your sound again.