It's a guitar, not a fragile piece of whatever. Just play it and if it gets scratched, chipped, dinged, so be it. SO many people overthink caring for guitar finishes. If you are worried about a nitro finish you should have bought a poly-finished guitar. No difference in caring for a nitro finished guitar over a poly finished guitar. If you feel so inclined to do so, wipe it down with a dry old-shirt once in a while. If you're anal retentive get some polish. Spend more time playing, less time worrying.