The most important part of applying two pack paint is performing proper mixing before the paint even touches the surface.
Two pack paints come in two types - solid and clear types. Solid is usually applied on a primed surface to achieve a colourful finish and the clear variant is usually applied over a wall surface or material surface to give a metallic, acrylic, or glossy look. Both types of to pack paints are applied over a surface almost similarly. The solid two pack paint consists of two pack paint colour, reducer and hardener. The clear consists of two pack clear coat, two pack hardener and two pack reducer. After pouring the blend into the paint sprayer (for both clear and solid), you should remove any paint stains from the tip of the sprayer to avoid losing the quality of hue you require. The final step for both clear and solid paint is the application and it's done coat after coat (usually 5 - 10 minutes of waiting after a coat) until all parts of the surface are even.
Spraying double pack paint in a more enclosed place such as a room in your house can be detrimental to your health if not enough safety measures are taken. When handling two pack paint equipment, you need to know the risks involved. Two pack paints are isocyanates and contain lots of toxic substances such as epoxy, polyurethane, base components in addition to catalysts and hardeners. Two pack paints can harm during the setup stage, the painting and clean up. Exposure to any of the toxic substances can lead to major illnesses like asthma, lung cancer, neurotoxicity, kidney and nervous system damage and so on. The list is quite long. So when you consider going through with using a double pack spray paint at home or in a garage there are certain safety measures to be met. A good PPE should be worn properly along with complete protective gear to reduce the risk of inhaling any hazardous fumes and chemicals. Goggles for eye protection are needed. Ideally you need a spray booth. Fans should be set up so that toxic fumes can be pushed out of the building. Protection should be a priority as early as before setting up the blend and even during the clean-up stage.
Is it an HVLP (high volume low pressure) or an LVLP (low volume low pressure) spray? An HVLP is quite common in today's market due to its many advantages such as its efficiency and the ability to control your spraying. Over-spraying can be avoided and you get to enjoy a better flow out. This is possible because an HVLP spray gun can use 10 - 14 scfm at 40 psi. So, for solid colour two pack paint, it's best to go at 26 - 29 psi. While for the clear variant, 28 - 29 Psi will suffice as it offers a smoother flow out. Another model you can consider is the low volume low pressure (LVLP) spray paint equipment. Which is intended to make your spraying experience a lot easier and less smudgy and this is possible because such equipment requires less effort than the HVLP. Just 10 - 15psi is enough for the solid two pack paint. And 20 - 25 psi for the clear paint.
The most important part of applying 2k paint is performing proper mixing before the paint even touches the wall or the object you wish to coat. The results from the disproportionate two pack paint blend include:
Stickiness.
Uneven gloss.
Delamination.
Blooming.
The best way to achieve an even mix of two pack paint on a molecular level is to put each mix of equal proportions (paint colour/clear coating, reducer, and hardener) in separate containers and then blend (a power mixer is advised). After successfully mixing the two pack paint, the next important substance to work with is the primer. There various types of primers, each for a specific surface. For instance, there's the etching primer which works great with two pack paint on a metal surface or over any painted surface (wall or car). Just like the sandable primers and the epoxy primer, which can be applied to any surface. Once the primer is applied on the wall or any surface you wish to coat then the application should commence. It's best to use a spray paint gun with the appropriate psi as this can give you the best result. But if such a method is deemed too hazardous and you require protection, then go for a roller paintbrush. Although the job of painting evenly would be strenuous given it's less precise than spray painting.
Adding a clear paint to two pack paint improves the overall paint job. After all, the major reason why clear paints are usually added to two pack paint such as direct gloss is to give it more depth as it ensures it flows out better and it becomes easier to polish on. The reason why it's easier to polish is that adding a clear coat affects the curing of the paint. This process will make the paint a lot softer to work with and in turn, the paint will take quite a while to cure because you're altering the state of the paint.