Unwanted noise removal

[huejahfink]

It might be possible via spectral editing, depending on the nature of the sound around it - but this kind of issue is best addressed on the offending channel in the mix.

I wouldn't wait to sort that kind of issue out. Some mastering engineers wouldn't even think of touching a problem like that, others might try - but I'd say you had no guarantees in general leaving it to that late stage.

[IMRECS]

that's what i figured, though can't really do mix recalls so it seems were stuck with them...wonder if these things will be a problem at all, since my band members don't really notice them until i point them out, and they are really only noticeable when listening on headphones...nevertheless i hear them

[huejahfink]

PS... if you definitely no longer have access to the mixes themselves, you are welcome to send over the offending files with some notes, and I will take a look at those specific issues only and I will see if I think I can easily spectrally edit the noise.
You can send them on to your regular engineer afterwards, I'm not trying to tread on anyone's toes - just help with this specific issue.
Send links to the email address in my signature (appears on the first post), or via PM.

The way I see it - if you can hear it, and it is undesirable - then it is a problem.
We might be able to fix it for you.