Prepping for Spray Paint

October 23, 2013 by rondex

The key to achieving a professional quality finish when touching up your car’s finish is to do it professionally. While there is some art in actually applying the paint to your car, most of the hard work is done beforehand. The more thoroughly prepared the surface, and the painting environment, the better the paint job.

This cannot be stressed enough: don’t rush. The upfront investment in time and effort in preparing for the actual application of paint pays big dividends.
Is there damage to the metal? If scratching, denting, or corrosion has caused the need for this repair, it absolutely must be dealt with before you can even think about repainting. If there is rust, it must be removed. Body panels must be straight, and if there are scratches in the surface of the car, they must be sanded out or filled. Rondex has polyester fill putty that is ideal for small imperfections.

Before you begin preparations for paint, you need to decide exactly how much area you are going to cover. Owing the effects of ultraviolet light, there is likely to be a subtle difference in the color of your new paint when compared to the rest of the car. One of the best ways to hide this is to paint right to the edge of a panel, or to a contour line in the body of the car. One of our spray cans covers approximately six square feet, so you can estimate how much paint you will need for the job based on the size of the area you want to cover. Use masking tape (automotive paint grade) and paper to isolate the surface area that you want to paint, to ensure you don’t slip and make a mess of an adjacent panel.

The area to be painted needs to be free of any contaminants.

Dirt, dust and other particles can be removed with tack cloth. The area should be cleaned with a degreaser, and rinsed clean afterward to be sure there’s no residue.

You will need to sand the entire surface that you are going to paint. If there is existing paint, you will need to “scuff” it with 600 grit sandpaper or emery cloth, so that the new paint has some texture to adhere to. Make sure that any visible rust is removed, using 200-grit paper or a wire brush.

Rondex Etch primer is designed to form a bond between unpainted surfaces and the paint that you will apply. You can use it to build a smooth surface over small scratches, and apply it directly to bare metal, body filler, polyester putty, and painted surfaces that have been scuff sanded. Two or three coats can be applied, but must dry overnight before the next stage can be sprayed. If you’re painting flexible bumpers, make sure you have flexible primer paint.

Once you’ve masked off adjacent areas, dealt with any dents, rust, or scratches, and cleaned and sanded the area, you’ve done 90% of the work. You’re only a few steps away from a fantastic finish.

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