You could try some heat followed by peeling and WD-40. I would use a hair dryer (safer than a heat gun for the surface) to provide some adhesive softening. WD-40 is made of light distillates of petroleum and will safely attack many adhesives while the light oil in it prevents them from immediately re-adhering to the surface.
This is the technique I use to carefully remove old stickers and tape from vintage radio gear I restore.
NOTE and CAUTION: WD-40 is VERY flammable so don't spray it with the heat source still active. The most volatile components evaporate quickly but you don't want to burn the sticker off! At one point, some producers of IDI diesel engines recommended a light spray of WD-40 as a safer alternative to engine starting fluid since it burns but not as explosively as ether when it hits hot glow plugs thus it was far less likely to create angled connecting rods.
Good luck!
Rodger
This is the technique I use to carefully remove old stickers and tape from vintage radio gear I restore.
NOTE and CAUTION: WD-40 is VERY flammable so don't spray it with the heat source still active. The most volatile components evaporate quickly but you don't want to burn the sticker off! At one point, some producers of IDI diesel engines recommended a light spray of WD-40 as a safer alternative to engine starting fluid since it burns but not as explosively as ether when it hits hot glow plugs thus it was far less likely to create angled connecting rods.
Good luck!
Rodger