Tank stickers

Use a hair dryer on low heat to loosen the adhesive and patiently peel them off by hand. Mine came off without drama or residue. They also make plastic single edge razor blades that would work as well without scratching the paint.

Any adhesive left behind may be removed with most car polishes/waxes like Nu Finish which contain petroleum distillates.

Ditto.

Left it out in the summer sun instead of using a hair dryer, worked like a charm.

I took mine off in the sun, no hairdryer.
WD40 also works to remove the glue.