Reparos de pintura

501-36-43 Paint - General Information 501-36-43 DESCRIPTION AND OPERATION Paint Repairs General information There is a great difference between painting in production and repair painting. In production, only the bodyshell is painted, it has no trim, upholstery or assemblies. Because of this, other paints, tools and processing techniques can be used. In contrast to that used in production, paint used in the workshop must dry at low temperatures. Plastics and the vehicle electronics must not be subjected to temperatures greater than 70°C. The painting process in the case of repair work consists of two phases: ‡ Pre-treatment of the surface for corrosion protection and the smoothing of irregularities. ‡ Top coat application. The precondition for a professional paint finish on a vehicle is the permanently maintained cleanliness of work spaces, tools and equipment, Original materials must be worked according to the manufacturer's instructions, so that no problems arise in the processing nor during drying. The room temperature must be 20 - 25°C and the humidity must be low. Temperatures which are too low or too high can lead to porosity, poor flow and boiling. High humidity leads to paint damage such as tarnishing of the paint film (matt film), adhesion problems and craters. Pre-treatment of the surface Perfect preparation of the subsurface is the precondition for a brilliant paintwork result. Faults in the preliminary stages delay completion and cause unnecessary extra work. The working steps described here demonstrate how important it is to follow these instructions step by step. NOTE: Thorough cleaning of the vehicle and especially of the area being repaired is particularly important because of the danger of contamination of the paint. Clean the area of the damage TO BE UPDATED LATER Clean the damaged surface thoroughly, to allow the extent of the damage to be seen. Use silicone remover to produce a grease-free surface. NOTE: The treated surface must be rubbed with a clean dry cloth before the solvent evaporates, otherwise there will be no cleaning effect. Effective de-greasing is important not only before the application of paint, but also before all sanding stages, for two reasons: ‡ During sanding of grease contaminated surfaces, globules may form with the sanding dust. Sanding marks will occur and the sanding medium quickly becomes unuseable. ‡ Oil and grease are embedded by the action of the abrasive particles, and are then very difficult to remove. Establish the area of damage and the repair stages. In doing so, establish how much disassembly work must be undertaken. Perform a color test at this stage. Mask off the area of the repair ready for preparatory work. Sand out the damage location TO BE UPDATED LATER