Hello painters and decorators, in this post we provide a quick overview of airless spray painting. Many of you professionals will certainly be familiar with all these things, but we thought it would be useful anyway to provide an airless spray painting guide.
Before starting with the spraying, it is necessary to proceed with the masking of the room to be painted.
Since the paint is sprayed, it is necessary to ensure that the areas which are not to be sprayed, such as edges, doors or windows, for example, are adequately covered. So prepare a lot of tape.
Preparation of the material
The quality of the material is an aspect that can never be underestimated. It’s not that you don’t have to check your expenses but it’s always better to spend a few dollars more to focus on quality than cutting the costs as much as you can.
Depending on the material to be sprayed and the desired consistency we add up to 5% of water to the paint and mix, until we obtain a fluid consistency, fundamental to improve the adhesion of the material on the wall.
Choosing the right nozzle and filters
Choosing the nozzle is one of the most important aspects of airless painting. The size of the nozzle hole will depend on the material you want to use and also on the type of surface. As a rule, detailed information about the most suitable nozzle size can be found in the technical information sheet of the material.
Once the paint is ready for use, we will have to prepare the airless pump.
Airless spray painting step by step
1. First of all, clean the inside of the pump to avoid any risk of clogging or mixing with materials that you have used before. For this purpose we recommend the FARBMAX products for maintenance and cleaning.
2. Insert the suction tube into the material bucket.
3. Check the pressure settings of the machine (for example by testing on a piece of cardboard) depending on the material you are using.
The best way is to gradually increase the pressure until you reach a spray pattern that satisfies you. To avoid losing too much time in this phase, read the manufacturer’s recommendations on the product data sheet, where the level of pressure necessary for an optimal spray pattern is generally indicated.
4. Start to spray from left to right (or vice versa) or from top to bottom. Once the first paint application is finished, repeat the same action in the opposite direction, so that the different layers overlap more or less in the middle.
Acrylic and latex paints are excellent for airless painting.
If you are spraying using an air-assisted machine, the paint is sprayed through compressed air, allowing the paint to dry faster and to reduce overspray. Disadvantage: the nozzle may clog more often if the paint is not well diluted.
Remember that at the end of the job, the pump must be cleaned to keep it in good condition until the next use.
The technique described above applies to spraying walls. For the corners, it’s best done like this: paint vertically from top to bottom, covering the entire corner after painting the walls. Even if it looks like the spray pattern is not uniform, it will disappear once the material is perfectly dry.
As for painting the ceiling, this one of the aspects in which spray painting differs from when using a roller. With a roller you start from the ceiling, to avoid splashing the walls. When working with a paint sprayer, on the other hand, the ceiling is the last part to be painted: it is necessary to mask the walls in order to avoid smudging and splashes.
In short, airless spray painting is the ideal solution if:
- you do not like to waste too much material
- you want to paint quickly and easily
- you want to use airless lances / extensions for high ceilings
To sum up
This is not the first article we dedicated to the basics of spray painting. Here is a summary of the articles published so far:
|2||The 5 things you should never do when spray painting. A list of the most common errors.
|3||How to choose the right nozzle? What you need to consider when choosing the right spray tip for you.|
|4||How to clean an airless pump. Something you should never forget to do – ever.|
|5||Complete guide on spray painting. The article that you just finished reading.|
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