To avoid adhesion problems, the surface to be painted should generally always be dry, clean and free of grease. For problematic substrates, such as plastic, polystyrene or aluminum, the appropriate special primer should be used.
Runners in the coating can be caused by several reasons. To avoid these, care should always be taken to ensure that the spraying distance to the object is neither too short nor too far. The same spray distance (15 - 25 cm) should always be maintained. In addition, the paint must not be applied too thickly. It is recommended to paint in several, even, thin layers, e.g. first horizontally and then vertically. Always start spraying outside the object to be painted to avoid paint runs.
The "white tarnish" of the coating is caused, for example, when the air humidity is too high. The "gray haze" can be polished out after the coating layer has dried thoroughly. The optimum processing temperature is between 20 and 25°C, with low humidity. In this way, the effect can be avoided.
The paint can flake off if, for example, a primer coat with the plastic adhesion promoter was not applied when painting plastics, as the paint has no adhesion to most plastics. In addition, cracks can occur if a highly pigmented paint, e.g. a primer, is applied to a low-pigmented paint, e.g. a topcoat.
The ideal paint structure: 1. primer - 2. color-imparting base or top coat - 3. clear coat. Furthermore, cracks can form in the paint finish if the paint buildup is carried out with different types of paint. The product series of one manufacturer should always be used for the complete paint buildup to avoid incompatibilities.
Due to a too large spray distance, the coating does not run well on the surface. It already dries in the air and settles as a spray mist on the surface. This can be avoided by maintaining a constant spraying distance (recommended 15 - 25 cm). In direct sunlight, "bubbles" can form which make the surface no longer shiny. Therefore, paint in a place protected from the sun, at an ideal processing temperature of approx. 20 - 25°C, with low humidity. It is also recommended to paint in a place protected from the wind to preserve the gloss of the paint, which would be diminished by swirled dust.
Wrinkling refers to the so-called "pulling up" of the coating. If a synthetic resin coating is overcoated with another type of coating or with itself after it has dried, it will pull up or form wrinkles. Synthetic resin coatings are oxidatively drying coatings, i.e. drying takes place under the influence of atmospheric oxygen. It takes approx. 6 hours for the top coating layer to dry. After this time, the coating should no longer be overpainted, since if the coating is applied again, the lower coating layers will swell due to the renewed supply of solvents. Recommendation: Keep the same type of coating, e.g. NC coating on NC coating, for the coating build-up (primer, top coat, clear coat).
The so-called orange peel can be caused by a too large spray distance. The coating (spray mist), which has already dried in the air, settles on the surface and no longer runs. Initially, the surface is only rough and partially matt. After a thicker varnish application, the orange peel forms. This can be avoided with a constant coating distance of approx. 15 - 25 cm and ideal coating temperatures, between 20 to 25°C.
There are various causes for this: The reason may be that the spray paint can has not been shaken long enough. It should always be shaken thoroughly for 2 minutes, starting from the audible stop of the mixing balls. This is necessary to mix the color pigments of the paint. In addition, it may be due to the fact that the paint used does not cover well, resulting in too little paint being applied. It can also be due to the lacquering itself. With metallic paints, the painting result depends on the spraying distance. If the spray distance is too short, the color will be too dark. If the spray distance is too great, the end result will be too light. To avoid this, you should first test spray and check the color shade, as well as maintain the ideal spraying distance (approx. 15 - 25 cm) and the same painting speed.
The spray paint can may not have been shaken properly, in which case it should be shaken again thoroughly for approx. 2 minutes. It is also possible that the spray can itself or the contents are too cold. In this case, it should be slowly warmed up to the recommended processing temperature. Another reason could be dried product components in the riser tube or in the valve. In this case, turn the spray paint can upside down and spray twice so that the propellant dissolves the residues and transports them to the outside. In any case, make sure that the finger is placed correctly on the spray head so that no residue remains on the finger or can when the paint comes out.
An intermediate flash-off time, i.e. the waiting time between spray coats, must be observed between each paint application. Precoat one spray pass, in evenly thin coats, and apply a covering final coat after 3-5 min (varies depending on the product). This avoids overcoating and paint runs and the paint surface has been coated evenly.
Recognizable by the can weight, the audible stop of the mixing balls and in connection with the production date, which you will find encoded as a code on the can bottom, beaded rim or can end. The minimum shelf life of a 1K aerosol can is 5 years, the minimum shelf life of a 2K aerosol can is 3 years. For exact determination, please send us the product name and, if applicable, the article number and the code.
One reason could be that the coating of the fresh coating application was carried out at too low temperatures. At temperatures below 20°C, the coating dries more slowly, since drying, in the case of NC/AC coatings for example, takes place by evaporation of the solvent. Drying is temperature-dependent. The colder, the slower the solvent evaporates. It can also be a silicone resin lacquer, which is mostly used for heat-resistant lacquers. These heat-resistant paints should only be used on cold objects and primers and clear coats should be avoided, as these are not heat-resistant in most cases. The finished painted objects, such as radiators, should be heated slowly.
The top coating layer has dried and can be touched or transported. However, the surface is not yet mechanically loadable. A coating is loadable when it is completely dry. Overnight drying is optimal, i.e. 24 hours. These times vary depending on the spray paint product, so always pay attention to the information on the product label.
If the spray paint can is not empty, shake it again well until the mixing balls can be heard again. However, the valve may have become clogged. In this case, wipe off any residue on the spray head nozzle, turn the spray paint can upside down and spray twice briefly.
A 1-coat paint means all paint systems that do not require overcoating with clear lacquer.
The 2-coat paint system is preferred in the automotive industry, e.g. for metallic shades. A base or topcoat is used as the coloring component, which must be overcoated with a 2-coat clearcoat. Although these coatings are characterized by very good covering properties, they are not sufficiently weather-resistant without overcoating with a clearcoat.
1K means 1-component coatings. These are basically all coatings that are processed without the use of a hardener.
2K means 2-component coatings. These are all coatings that cure or dry by the addition of a hardener. In spray paint can technology, this means: Paint and hardener are combined in one spray paint can. The hardener is in a separate container, which is released at the touch of a button and mixes with the paint. The 2-component system is particularly weather and UV resistant and ensures the highest product quality.
In the case of a chemically drying coating, drying takes place through a chemical reaction with the hardener. Once these 2K coatings are fully dried, they are particularly resistant and permanently weatherproof.
Physically drying coatings are coatings in which the drying process is based on the evaporation of the solvents. The coating can be dissolved again with solvents.
During paint preparation and painting, it is recommended to wear gloves, protective goggles and protective mask (fine dust mask or paint mask).
The optimum painting temperature (ambient temperature) with aerosol cans is approx. 15-25°C and approx. 40-80% relative humidity. At low temperatures, spray paint cans should be tempered somewhat. This is beneficial for the application behavior.
Under no circumstances should the spray paint can be subjected to mechanical stress or strain. Do not hit the can on an edge, otherwise the can will lose load resistance and may break. Also do not open by force, for example with a screwdriver.
The substrate to be painted or the object to be painted must be clean, dry and free of grease. Sand the surface to be painted and any existing old coatings and (additionally) remove rust from metal.
The areas that are not to be painted or protected from spray mist must be masked or covered over an appropriately large area.
Shake the spray paint can thoroughly for 2 - 3 minutes, starting from the audible stop of the mixing balls, so that the color pigments of the paint mix well.
To avoid painting errors, you should test spray after shaking up the can and check the color shade and compatibility with the substrate. Either on a cardboard box, a test object or an inconspicuous spot on the object to be painted.
The correct and consistent coating distance must be observed. This is approx. 15-25 cm, depending on the product. This is important to avoid coating errors such as runner formation. In addition, the information on the respective product label must be observed.
The drying times vary depending on the type of coating, object to be coated, substrate, temperature, humidity and film thickness application. The drying times are differentiated between dust-dry, touch-dry and completely dry. The exact drying times can be found on the respective product label, technical data sheet or on the Internet.
The spray paint cans must be stored and transported upright, cool, dry and frost-free. The cans must be permanently protected from sunlight (never above 50°C), chemical and mechanical influences. The ideal storage place is in closed rooms, e.g. cellar, garage, workshop, etc. Safety instructions on the can and the legal regulations of the storage location must be observed.
A spray paint can should be used until no more paint comes out when the spray head is actuated or "no more hissing" can be heard. Only then is the can completely empty. Spray paint cans that have been emptied of residue are recycled via the collection of recyclable materials (yellow garbage can, yellow sack, containers for lightweight packaging). Cans with contents are to be disposed of via hazardous waste. Removable plastic parts, such as caps and spray heads, are sent for plastic recycling via the collection of recyclable materials.
SprayMax FillClean products are, among other things, very precisely matched by the formulations to the products to be filled, in contrast to "universal solutions". This matching achieves higher accuracy, quality and ultimately also the paint level and appearance.
The device mechanics require at least 7.5-8 bar. Lower pressure leads to device malfunctions.
The difference lies in the can caps. For 1K FillClean products, the special can cap is simultaneously intended for use directly in the device as an insert in the filling cylinder. This is not possible with 2K Fill In products, as the can cap carries the release button. 2C paint spray cans are therefore always Fill In versions. For filling 2C spray paint cans in the FillClean device, the separately available cap set including the adapter ring must be used.
