No need to remove any Parts for Installation. We include a bottle of 3M prep 70 Solvent and Lint Free Rags. Just Wipe Surface Clean, and apply Trim. Detailed installation instructions are supplied with the set.Request Return Authorization Number from us, with in 15 days of receipt of the product. All products must be in perfect condition, in the original package and if you are going to return car interior or exterior kit, 3M adhesive tape has not been removed.