you're saying the paint is raised? like corrosion under the paint?
if so, you're going to have to remove the paint and have it repainted/
touched up.
on the cars i care about (
) i remove bug guts
right away after the drive each time using SpeedShine.
i keep a good coat of SprayOn Wax on there from Griots
for the super slipperyness especially during the warmer
months.