1.Determine the scope of repair

Take a closer look at the site of the injury. If the injury is greater than 1/3 of the component, it should be repaired with excessive repair. Over repair is that the varnish is sprayed on the whole part, and the paint is removed from the damage to the original paint, so that the original color paint is retained and the color difference is avoided. Because of 1/3 of the damage, grinding, primer, paint, varnish and the mouth of the more than 2/3 of the components, and the remaining parts have been little, and lost the significance of repair.

2.Determine the extent of injury

If it is a shallow scratch, there is no need to play putty, can be directly polished, until there is no trace, you can proceed to the next step, if it is a deep scratch or pit, you need to play putty, if you need to do deformation sheet metal processing.

3.Construction protection

Prepare the relevant materials and tools, and tape the parts other than the damaged parts, especially the edges and corners, so as to avoid unnecessary damage when grinding.

4.Bottom treatment

Clean around the damage parts of the sediment, if deep scratches will need to make a start with putty putty, P240 sandpaper burnish rough putty damage improve adhesion, according to atomic ash and curing the damage size amount of agent mixing ratio: 100: (atomic ash curing agent according to the temperature was 2-4 the ash scraping first) compaction pit or scar and then the scraper was 45 degrees scraping injury site is slightly higher than the surface of the parts, improve the drying rate with the iodine tungsten lamp baking. After drying, use P320 sand paper to polish it, then polish it with P800 sand paper. Spray primer. If it is shallow scratches can directly use P320 sandpaper (preferably with a clean dry grinding equipment in order to improve the speed and reduce the damage of workshop water) at the grinding formation, damage to the center of the feather edge edge radius should be in 60-100MM (by hand to touch the rice shaped convex, not feeling) and then P800 sandpaper smooth (in order to improve the adhesion and primer spraying quality). Clean the surface, the gap between water and dust with air gun, with good shielding masking paper damage outside the site of a radius of 80CM range can spray the primer, primer spraying should pay attention to not too much pressure control in 2KPa, 1/2 (wet spraying putty must be dry, otherwise they will bite paint). Primer after drying (available to bake iodine tungsten lamp to speed up the drying rate) carefully check there is no small trachoma, if there is to deal with gray eyes fill, and then use 1000# sandpaper to spray the range of primer and polished interface to use P2000# sandpaper carefully burnish to better integrate the interface. (the interface should be selected in the next part of the narrow local damage, can reduce the processing time to the interface, the interface should be left outside primer edge 300MM extends as far as the scope for grinding over enough space).

5.Masking deoiling

First with the wind and dust water gun parts gap blown clean with masking paper to spray the parts except parts carefully covered well (all parts, outside the shelter construction components to prevent paint mist falling unnecessary cleaning work in other parts), and then use the towel dipped in a little oil remover to wipe clean (spray parts the surface of the grease, to a wide range, and then wipe the dust cloth) with gas spraying parts will grab rub a can spray paint.

6.Spray paint

The dilution will be good for fully mixing paint (paint and diluent ratio 1:1) and filtering, spraying should be carefully controlled, adjustable pressure at 2 KPa to dry spray, spray again to use special cleaning cloth to wipe a (silver and erase surface suspended edges to gather silver), covering the first primer gradually the outward transition (whether spraying can completely cover, observe the iodine tungsten lamp) until there is no color so far (must use single color paint repair. Black paint simple transition).

7.Spray varnish

Confirm the color paint color can not completely dry after spraying varnish, according to the size of spray to pour the light oil and adding initiator (light oil initiator 10: 1) 2-2.5KPa spraying pressure, the first time the light spray temperature according to the static 1-2 minutes (the Gao Jing temperature time short of temperature at the end of incubation time long) and then sprayed second times, second times to spray gun to go slow compaction two molecular overlap (go to spray gun speed per second 40-60CM as the paint quantity may be), after the spray of light check leak sprayed place, especially the corner site, the confirmation can be carried out joint treatment. (varnish should not be sprayed too thick, otherwise it will affect the drying speed and waste)

8.Barge handling

Good after mouth spray varnish treatment, the light oil and the initiator a good mix of light oil and in accordance with the proportion of hybrid (mixed barge slobber light oil barge 1: 10 in the interface slobber) spraying, spraying pressure should be slightly larger from the new paint to the original paint can not be sprayed too thick to transition, uniform transition.

9.Bake

Spray before the UV lamp power supply is connected, according to the spray position placed lamp position to facilitate the operation, after 3 minutes after the open spray varnish baking varnish for 5 minutes, leveling, standing time, lamp needs 1-2 minutes after the preheating time, preheating can bake, with wear special goggles mask or glasses when baking, bake bake in order to improve the speed of the middle edge, baked the first time to a little distance to prevent excessive drying caused by the loss of light, lamp distance components of 20-25CM do not stop in a uniform moving baking to prevent excessive temperature, small area baking 7-9 seconds to dry, large area when the relative time to long, hand feeling is dry in the shade of varnish on the paper, and then touch in the paint, it feels smooth and dry, otherwise you'll need to go over

10.Grinding and polishing

Drying after remove masking paper, use 2000# sandpaper polished matte finish beauty and get rid of dirty spots, tears, polished interface to light grinding (polished must avoid grinding out a new scratch gravel clip caused unnecessary rework), after grinding with high-speed polishing machine and special abrasive polishing after grinding, polishing first with coarse abrasive polishing degree and crystallite abrasive polishing until full gloss, the interface to flip over the interface will be just perfect, exposed, throw not in place is not bright. Clean the parts, the seams and the bodywork.