Non of those methods will worjk if there is a clear coat over the stickers unless you want a messy finish…
The bikes look good withn them on, personally i think they look little shitty without, bit bland + bianchi make a good bike, its not like theyre a roadstar or something
If you could find some spray on paint stripper it will stripe the clearcoat off. Then you can apply the hairdryer method…this only apply to chrome pista.