Remove the decals when they are warm from the sun.
If any residue/adhesive is left behind, WD-40 works well and won't harm the finish. The primary ingredient in WD-40 is:
· 51% Stoddard solvent (i.e., mineral spirits: primarily hexane, somewhat similar to kerosene).
· 25% Liquefied petroleum gas (presumably as a propellant; carbon dioxide is now used instead to reduce WD-40's considerable flammability).
· 15% Mineral oil (light lubricating oil)
· 10-% Inert ingredients.
It's a great degreaser as well. I buy it by the gallon and just fill a spray bottle to clean anywhere there is road tar on any surfaces.
Then I just wash and wax afterwards.
