Stick on labels are hell on DVD's....IMO.
They can create wobble. They also can cause overheating issues in some standalones due to the added weight. There has also been talk that the solvents may cause shortened shelf life.
Some people use them with no problems...I would strongly suggest you don't...
This scan is a 2.7gb burn (pioneer A06) with label:
Not full playable
Same disk with label removed..I had introduced some errors getting that blasted label off (dings and scratches)..but this makes my point.