How To Clean Plastic Bumper Bifor Painting

Bumper painting and repair is ane of the almost usual processes at any bodyworkand paintshop as far every bit plastic repairs are concerned, due in part to where it is on the vehicle's body and because it is easily exposed to harm.

This part has evolved much over the last few years, both in terms of composition and shape.

In add-on to their aesthetics, bumpers have many aerodynamic and, higher up all, safety functions, it being a critical part absorbing impacts and mechanical force per unit area at low speed.

Today'south bumpers use a large surface area in the front and rear of vehicles. The part's size and the type of finish (same colour every bit bodywork, textured, colour combination, etc.) volition influence the painting process to be carried out.

Painting a bumper: possible scenarios

When painting a bumper, as it is a plastic role, you should accept into account a series of factors to ensure that it is correctly repaired. The flexibility of the role, its adhesion, mechanical stress or its chemical resistance are factors that will influence its treatment and painting.

To achieve the best possible result, always follow the indications provided for specific processes and products involved in the painting of plastics ( plastic putties, adhesion promoters, textured paint, etc.) established past a tiptop-quality paint manufacturer such as SINNEK.

When repairing and painting a bumper, professionals can be faced with dissimilar scenarios depending on the severity of the damage. Thus, for larger flaws, the entire bumper can be replaced with a newly manufactured part. In this example, the preparation and repainting procedure will exist different.

Nowadays, the vast majority of vehicle manufacturers supply replacement plastic parts with a pre-intermediate coat treatment (primer).

This way, professionals receive a part that is set up for the finish paint to be applied directly.

On the other hand, it could also happen that the new office lacks this pre-coat of primer, which in plough will influence the painting process. An adhesion promoter or primer that optimises the anchoring of the subsequent coats will accept to be applied.

In this tutorial, we will focus on a third possibility. A scenario where the bumper is partially damaged, or comparatively damaged to require its replacement with a new part. In this case, the steps to be taken are every bit follows:

Steps to repair and pigment a bumper

1. Prior assessment of damage

   Deep test of the extent of the damage for a right choice of repair process. In the example described, you lot will not need to use adhesives or weld the plastic. It is surface damage, and therefore does not affect the structure of the part. A good do is to mark all flaws detected for amend controlling the repair.

2. Place the type of plastic

   You lot should identify the type of plastic the part is made of, since this volition influence its adhesiveness to certain paints. To do this, detect the code corresponding to the blazon of plastic which will be located on the part'southward inner side. This is an important step because, if the plastic is compatible with the adhesiveness of the filler to be used (information provided in the filler's data sail), it would not be necessary to utilise an adhesion promoter beforehand.

3. Thorough surface cleaning

   Accident the surface with an air gun, and clean it with lather and h2o. Then, degrease in depth with a special plastic degreaser to remove any surface substance adhered.

4. Edge sanding

   Sand the edges of the damage with a P150 or P220 sandpaper and a sanding sponge to ready the application of plastic putty.

5. Air gun blowing and cleaning

   Remove the sanding remains with an air gun, and clean the surface thoroughly again.

6. Applying adhesion promoter in open up areas

   If yous reach the plastic part during the sanding process, cover the bare areas that show the "live" plastic with a plastic adhesion promoter. This will heighten the putty's adhesion to the surface of the bumper.

7. Applying plastic putty

   Apply a plastic putty, such as SINNEK's PP/7832. This type of putty provides bully filling of cracks and scratches, and excellent sanding and finish smoothness.

8. Sanding the putty

   Sand the remaining excess plastic putty to level and fifty-fifty the surface. Then, in partial repairs, sand the expanse to repair, and in large repairs, sand the entire part. To do this, use a refining sandpaper: P320 / P400. In hard-to-reach places and nooks, utilize a sanding sponge.

9. Bravado, cleaning and degreasing

   Subsequently sanding, clean the surface of the office thoroughly, once again using a plastic degreaser.

10. Applying adhesion promoter

    Check whether the type of plastic of the part is compatible with the direct awarding of the filler (shown in the technical information sheet). If this is non the instance, employ an adhesion promoter for fast-drying plastics, such as SINNEK's PL/1895. If the damaged area is not big, you tin utilise a spray-on promoter to be more than productive in the repair. It is advisable not to load too much product to forbid whatever possible paint detachment or solvent reactions. When applying the product, always follow the specifications provided in the product's technical data canvass in terms of drying fourth dimension, gun aligning, etc.

11. Applying the primer

    To help anchoring the final coat of paint, apply filler to the bumper. Depending on the size of the damage and the type of repair to carry out, y'all tin choose between dissimilar filler processes (in all cases the shade of the chosen filler must friction match the colour shade of the finish).
    1. Spot Repair: if the surface is non too large, you can use a spray filler, which volition help to optimise the repair time, and will provide good filling and adhesion.
    2. Standard procedure:  apply a UHS filler, which will provide skilful functioning in terms of fast drying and easy sanding.
    3. Wet on wet procedure: use a wet on moisture filler, which will provide a high quality intermediate coat, reducing the repair time as sanding the surface later its application will not be required.

12. Sanding the filler

    In one case the filler has dried, sand the surface with a P400 sandpaper (two-glaze systems).

13. Blowing, cleaning and degreasing

    In one case again, make clean and degrease the whole part thoroughly.

14. Texture application (optional)

    If the surface has textured areas that are typical of this blazon of office, apply a textured paint for bumpers, which will get out a satin stop similar to the original. To achieve this consequence, you can use the textured bumper paint PL/7870 by SINNEK.

15. Applying the terminate paint

    Then, apply the final terminate paint. Apply colour and clear coat to the role, always following the specifications of the technical data sheet, and other factors such as the choice of hardener and the room temperature and humidity.

Conclusion

Without a incertitude, a correct bumper repair and painting will directly influence the productivity and profitability of the bodywork and paint store, mainly considering this is a very usual type of repair in the day-to-day piece of work of a professional. Take into account the specific characteristics of plastic materials in bodywork, and follow the steps described, and you will exist sure to achieve a professional quality finish.

Source: https://academy.sinnek.com/en/painting-and-repairing-a-bumper-full-process-step-by-step/

Posted by: battlerunted.blogspot.com

Share this post