What colour, wood type is your guitar/guitarneck? Do you know what coating it has? Which part of the neck exactly? What is your guitar exactly? You said you used fingerboard solution so I guess its on the fingerboard, but more information could help us to help you.
But you will get answers saying that spots and dings from daily usage and playing is good, and I agree with that. However say your roof is leaking Sodium Hydroxide onto your guitar and causing the spots then that is not a very good thing for you nor your musical instrument.