Mercedes S-class W202

1993-2000 of release

Repair and car operation

13.34. A paint and varnish covering

THE GENERAL DATA

Рихтовочные and лакировочные works on a car body assume knowledge of a material and its processing. Such knowledge is got during long-term practice. Therefore here data on elimination of only small malfunctions of a body and a varnish covering are resulted.

The same is necessary for repeated varnishing necessarily лакокраска, since. The slightest differences of colouring after the termination of works are evident at once. Corresponding tone of a paint is specified by the manufacturer on the firm tablet, as varnish number. The firm tablet is in a motor compartment on a forward wall.

If distinction between a firm varnish and a repair varnish it speaks change of colour of a varnish while in service the car as a result of ageing, an ultra-violet solar irradiation, extreme fluctuation of temperatures, weather conditions and chemical influence, for example, industrial emissions nevertheless takes place. Besides, damages of a surface of a varnish, change of its colouring and fading take place, if care of a varnish covering and its clearing were made by improper means.

The metallized varnish covering consists of two layers, the basic varnish – a metallic and a colourless integumentary varnish. In the course of varnishing the colourless varnish is put from above a damp basic varnish. Danger of difference of colour at repeated drawing of the metallized varnish covering is especially great, since. Here already various viscosity of a repair varnish results in distinction of colours in comparison with a firm varnish.

Elimination of damages from blows of stones

To avoid the big repair caused by occurrence of a rust, it is necessary to eliminate small damages of a varnish covering regularly.

For elimination of small scratches and traces from blows of stones which break only an integumentary varnish and do not get to a tin, in general, there is enough processing by a varnish pencil. Along with it the varnish helps with tubes with a brush also, and also on sale there is самоклеющаяся a varnish film in the event that damage rather slightly or mentions only a first coat.

Deeper damages from blows of stones on which the rust is already formed, it is cleared удалителями rusts, a knife or a small screw-driver, there is no yet a pure tin. It is very important, that at all does not remain even small stains of a rust. Under удалителями rusts are meant the small plastic sleeves supplied for выцарапывания of a rust with a short wire brush.

The cleared places should be carefully dried and degreased. For this purpose a place of repair and surrounding varnish to clear удалителем silicone.

To put on the cleared metal surface a thin brush a little a varnish first coat ("Primer"). As the first coat usually is available on sale in aerosol packing it is necessary to put a few first coats on a cover of packing and to dip in it a brush.

After first coat drying to varnish a place of repair from banks with a varnish for тампонирования. In such packings the brush is built in a cover. If on hand there is only one aerosol packing with a corresponding paint выпрыснуть there is some paint on a cover, and in summary to put a varnish a thin layer a brush. Always to put only a thin varnish coat that it did not spread. In summary to give to a paint it is good to dry out. Varnishing process to spend until deepening will not be filled by a varnish and it will not be appreciable at level of the surrounding varnished surface.

Elimination of deformation of a body / removal of bowls from corrosion

Small лунки can be eliminated with the help рихтовочного a hammer and a suitable manual anvil. At deepenings in a body from a rust it is recommended to replace the damaged detail in a complex, depending on damage size, or to weld a sheet steel.

Elimination of deformations of a body

Small deepenings are corrected рихтовочным by a hammer. Thus on the other hand deepenings hold a manual anvil. Not too strongly strike a hammer on an anvil, differently the tin will cave in and will not be smooth. Work, beginning from edge to the middle.

Levelled surface periodically supervise a hand while it will not get the necessary form. Small surfaces later putty.

From a place of repair after alignment carefully remove the rests of a rust and an old varnish by means of the rough emery paper (120) tense on the grinding grandma, or polish with fabric circle. Paste over the decorative films located nearby or plastic details with a sticky tape that they casually have not been scratched at polishing.

Preparation for varnishing

Before varnishing wash up the car.

Varnishing spend only at temperature above +12°С, avoiding a direct solar irradiation and a wind.

Rust removal

Repair place paste over with a sticky tape casually not to damage an adjoining varnish.

Trihedral file or screw-driver, and also grinding paper № 120 remove a visible rust and a rust hidden by bubbles.

Grinding paper № 320 grind in advance a place round damage on width about 1–2 sm to a healthy varnish.

The zinced surfaces of a body grind, whenever possible, only to a first coat, instead of to the zinced surface.

Drawing of a protective first coat from corrosion (Primer)

Wipe a place of repair by a nitrothinner and remove a pure rag fat and a dust, allow to dry out.

That there were no further problems, Primer and an integumentary varnish put on it should be identical manufacture. Otherwise the varnish later can become covered by bubbles or shrink.

"Primer" it is sprayed on a tin cleared of a rust, from distance 25 see That the smallest splashes of an aerosol did not get on adjoining details, paste over a surface round a place of repair with a paper and a sticky tape.

In 10–15 minutes it is possible to repeat spraying. If after spraying it is necessary шпаклевка it is necessary to allow Primer to dry up.

Шпаклевка

Distinguish 2 kinds шпаклевки: two-componental шпаклевку and thin шпаклевку. Two-componental шпаклевка mixes up shortly before processing with a hardener. It causes fast hardening шпаклевки which can soon be processed after that. Such шпаклевка it is used for alignment of larger roughnesses of a body. Thin шпаклевка is decorative, smoothing small roughnesses. It is possible to put it in some layers. Both kinds шпаклевки are issued in tubes and banks, filling шпаклевки are available also on sale in aerosol packing.

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The prevention

Though on bank it is underlined that drawing шпаклевки can be made directly on the cleared tin, just in case we recommend to process preliminary a tin "Primer" (protection against corrosion).

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Put on the place of repair corrected or strengthened by fiber glass two-componental шпаклевку and allow to it to harden. Observe instructions of the manufacturer шпаклевки.

After drying grind roughnesses manually or a superfinishing head. Thus the grinding paper № 180 should be used. It is possible to use a paper for damp polishing. In this case moisten a place of repair with a wet sponge, and over a grinding paper from time to time in the course of grinding pour water enough.

In summary carefully clear a place of repair and allow to it to dry up.

Cover a place of repair thin шпаклевкой by means of wide, flexible plastic шпателя and allow to it to dry out a minimum within two hours. In repair places on закруглениях and contours use thin шпаклевки in aerosol packing is recommended.

Depending on a thickness of a layer thin шпаклевка should dry 2–3 hours.

Polishing

On sale there is a grinding paper of various granularity. The less its number, the more roughly polishing. For grinding two-componental шпаклевки granularity from № 180 to 240 is recommended; filling шпаклевка and an old varnish are ground by a grinding paper № 360 with humidifying. For last damp polishing before varnishing the grinding paper № 600 is recommended.

Prepared отшпаклеванное a place grind a damp paper № 360, thus constantly squeeze out a wet sponge over a recommended place. A sponge from time to time immerse in pure water and completely let's to it become impregnated with water.

For the subsequent damp definitive polishing approaches is better a special paper for damp polishing № 600, it it is possible to grind also a boundary varnish and varnish splashes. Remaining after that microscopic scratches on an integumentary varnish are hardly appreciable.

Clearing

Before drawing of a varnish covering it is necessary to clear of fat and from the silicone rests a ground surface and an adjoining varnish surface in width about in two palms. Is better for this purpose approaches удалитель silicone.

After polishing carefully clear a place of repair and paste over all adjoining surfaces with a newsprint and a sticky tape. At varnishing of wings carefully paste over tyres and the shock-absorber.

Repair place whenever possible always paste over so that the sprayed surface reached the nearest decorative lath or to body edge, since. On the brink of colouring paint flows are always formed. If rather smooth transition to a firm varnish is impossible, pasting make on distance about width of two palms from a repair place.

For prevention of subsidence of a dust sprinkle a floor water.

Varnishing process

That there were no problems in the course of the varnishing, preliminary put Primer the aerosol varnish should be made the same firm, as. The varnish in this case will not form bubbles and to shrink.

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The prevention

We recommend to be trained preliminary in varnish drawing, for example, on an old wing.

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The surface intended for varnishing should be dry and cleared of a dust. If there is a possibility, blow its compressed air.

Humidify a floor with water that the dust was not formed.

Wipe a place of repair and area adjoining to it удалителем silicone. Even more optimum basis for an integumentary varnish will be created by wiping by the polishing paste deleting silicone.

Aerosol packing before use intensively stir up a minimum within 3–5 minutes, differently on a surface will arise begin to flow a varnish.

At a covering a varnish "Metallic" put a small amount of a paint from aerosol packing on any cardboard to eliminate particles of metal besieged on an elevating tube.

Extensive vertical and horizontal surfaces are sprayed by a varnish "crosswisely": begin spraying out of a surface and continue to move a stream in other direction, also having begun from the outside.

Small surfaces spray on a spiral outside inside to avoid too big dusting.

To conduct aerosol packing with uniform speed and on identical distance (about 25 sm) from a surface.

To provide probably imperceptible transition to a healthy varnish, it is necessary to put its minimum four blocked courses of spraying. Each separate drawing should increase a surface of the previous put layer by 2–3 centimetres.

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The prevention

If spraying is made on too short distance, spraying movement too slow or occurs to variable speed there are so-called flows of a varnish. It means that in some places the varnish flows down downwards, since. It is too much it выпрыскивается on the same place. The same occurs, if at change of a direction in the course of spraying the sprayer does not pass through the closed surface.

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Repeat process of spraying with 5-minute pauses for solvent evaporation until will be a sufficient varnish covering. Between separate courses of spraying, in particular for "Metallica", stir up aerosol packing, since. Particles "Metallica" quickly settle.

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The prevention

For a varnish "Metallic" it is very difficult to reach coincidence of colour to a firm varnish. Pigmentation (distribution of particles of aluminium) will be more uniform if last process of spraying occurs from distance not 25 sm, and 30 Slow movement of a sprayer see gives more sated colour, and fast spraying – more light tone.

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For a varnish covering "Metallic" is provided the basic varnish "Metallic" with a covering транспарентным a varnish, only after that the varnish "Metallic" gets the shine. Spraying occurs 3–4 times, thus each time it is necessary to do a pause for some minutes. Before the first drawing the basic varnish should stand 30 minutes of Transparentnyj opened a minimum (transparent) varnish should block a new basic varnish approximately for width of a palm, before it accordingly to extend a protective paper.

Empty aerosol packing. For this purpose establish aerosol packing on a head and выпрыскивайте a paint until it will not be.

After the termination лакировочных works at once remove all sheetings.

Allow to dry out the surface covered with a varnish. Drying it is possible to accelerate by means of strong a photo- or a reflex lamp.

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The prevention

Not to use the fan, since. As a result on a fresh varnish can be besieged завихренные dust particles.

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After paint hardening, a minimum in 48 hours, the raised dust fog on adjoining surfaces cautiously remove soft полиролем and a wadded tampon. Polish only in longitudinal to the car a direction.