No matter how easy this business may seem, the most difficult thing in it is to come up with the design of the future bumper. You can use the usual notebook, you can use Photoshop, or you can 3d max. You can do the approximate sketch. Before doing this work, dial a team of people, it will be easier to work with it, and the work will go very quickly. It is very convenient to use a fiberglass bumper overlay. You will have to remove the bumper for a very long time, and then you need to wash it. In this process of dismantling, you will clean the bumper of dirt and dust. Then you install the bumper at the same angle in which he stood on your car. The height from the Earth must be measured, since then it will be necessary to reduce the road of about 5-10 centimeters. If you have a broken bumper, then you can not hope for a ruler – it will not help you – do everything on a visual eye.It is best to cover the bumper with any water -repellent varnish so that there is less dirt on it. Then the contours of the future bumper are filled with mounting foam. It is best to pour it gradually and slowly, otherwise it simply does not dry and will not be suitable for cutting after 3-5 days. Buy a very good foam so that the bumper holds stronger and stronger. And buy it more, because it may not be enough, usually 3 large cylinders, or even all four.
In the manufacture of such linings, it is best to reinforce the foam with wire or strips of steel, screwed to the bumper. So we will get the “half” of the bumper already. Three days later, the foam has dried up, we mark the drawings on it and cut it, according to our scheme. It is best to mark and cut according to templates, because the error will be great – the bumper will look unnatural. Pen should not peel off fiberglass. As soon as we cut it, we gradually begin to skin (if the foam is flat, then the putty consumption will be less), and then peel off with a dense piece of paper.
Why are we doing this? In order for the work to be neat and pleasant. When everything was glued with fiberglass (it is good in that it stretches), it must be impregnated with epoxy. Prepare in portions no more than 300 grams, otherwise it will quickly harden. After 24 hours, the resin will reach the maximum strength. At the same time, you should not put down or plastering before – make a bunch of errors! You can dilute such an epoxy with a solvent, for better penetration, but not more than five percent of the resin volume. In the last layer of epoxy, you can dilute like an aluminum powder filler – the surface will be much smoother. With any pasting, try that the fabric falls smoothly. It is necessary to skin an orbital grinding machine with a grain of no more than eighty. The first layer of putty only with fiberglass. Otherwise, he cracks to very small pieces.
In the end, we advise you very carefully to check the places of possible bumper bends. There, putty can crack, and there is only one way out – glue glasses. If the bumper is made of ABS plastic, then we glue it without fail. Prior to this, putty should be diluted with white spirit, then just apply with a brush or sponge. So you get rid of many irregularities. Then remove the dust from putty, primed the layer on the bumper about 2-3 times, and at the end go with a dull sponge or a small skin. When everything will be even, then you can calmly color. You will not have problems with this. As you can see, this procedure is not very complicated, but it requires effort, it is best to do it in the company: one holds the bumper, the other unscrews the bolts. Everything is very simple, the main thing is to have desire and patience.
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