Our rust proofing process: As used by the MOD & NATO. Wheels come off (including spare wheel), Removal of all arch liners and any underbody guards to ensure the job is done properly. Proper preparation, including the removal of old underseal, is essential. All flaking rust will be removed, (various methods are used dependant on overall condition). Steam Clean the full underside and wheel arches of Vehicle using a degreaser to remove any dirt, grease and salt. Once dry and we have a clean surface to work with, Treat any rust with Rust Convertor (leave to cure overnight). Treating surface rust with rust converters is crucial before applying protective coatings. Injection of Cavities with Cavity Wax, all doors treated as part of the process.