First issue I have no idea as the red would be in the plastic not like a paint or dye so you are taking a risk.
If the disc plays fine don't bother you may mess it up and your OCD will be upset with you more

As for the print transfer, I have experienced it in the past, not sure if its ink, dust or what really.
But get the Novus 1 the cleaner and you will be fine with no issues.
Hope that helps.
You can also get glue, I remember only 1 disc I've had in all the years had a label fall off and I glued it back on with spray glue.
Be very careful, spray the sticker/label wait for it to become tacky then apply like it would have been 3-5 decades ago.