well i can help here i watched del remove mine on sunday .zippo style lighter fluid and a stanley knife blade
loosen end of sticker and little bit fluid into it leave it for few seconds then just pull gwently and it should move bit more fluid whenever it stops .if it start to tear start at another spot same process.theni took the frame home and used nail polish remover liquid to clean the glue mess that was left over.sorted .took while to remove and clean though so patience is virtue.
if ya read this del add owt i missed lol