to get rid of the glue residue left behind, I would start with something simple, that won'rt damage your paint
try WD -40, it works at removing residue and most folks already have it, after that GOO BE GONE< is another good one
from there and again before going to a harsh chemical
I;'d try this buying some of stuff, I hear it works wonders on decal residue and it will NOT harm the paint and doesn't smell harsh!
North Woods Natures Blend II
or
3M called Industrial Citrus cleaner
which are both good and not harmful to your paint!
after that I'd go to 3M adhesive remover , its pretty powerful stuff! it CAN DAMAGE paint so use care,
if this doesn;'t work, then I would suggest acetone or like chemicals, which again can remove the paint as well as adhesive, but it would be a more last resort to me!
but I doubt you;d need to go this far, if you use the things I listed first!