Car primer: pre-treatment and application tips
Before painting a car, it is required to apply an epoxy primer, primer-leveler or special sealants to the surface of its body. The listed compositions are varieties of primers for cars. In particular, epoxy car primer stands out for its dense structure and waterproof properties. Which synthetic paint is the preferred vehicle paint and which primer will provide the best corrosion protection? There is no single answer to the questions asked.
Many car enthusiasts are interested in how long the zinc primer dries and whether it is possible to paint the vehicle immediately after it dries. You will have to wait for the primer to dry from 15 minutes to half an hour, and you can start applying acrylic paint immediately.
The application of modern primers is not difficult. The spray gun will serve as an indispensable aid in this and will allow you to apply the primer by spraying. You can apply the primer with your own hands, and the main thing at the same time is to follow the sequence, because the use of an airbrush requires skill and compliance with all safety measures.
Before painting a car, calculate how long it will take to wait for the paint to dry, think about how to properly dilute it and start using an airbrush, you need to protect your respiratory organs.
It is recommended to use a respirator before work and use goggles and special gloves while the synthetic paint dries. It is forbidden to dilute paint and perform painting work in a room not equipped with supply and exhaust ventilation and paint surfaces without wearing protective equipment.
Features of selection and application
If you are thinking about what primer to choose for a car and you are interested in how long it can be stored at home, then carefully study the videos presented on thematic sites.
Priming the bottom and body of the car before its subsequent painting prevents the occurrence of rust and corrosion on the surface of these parts, after which reliable adhesion and quick "adhesion" of acrylic paint to the treated surface is ensured. Today, the market is full of various products for body repair, among them there are two-component putties, which can be epoxy or polyester.
Before using putty, prepare the surface (matte it and clean it from corrosion). At the beginning of kneading the putty, a pink hardener from a tube is added to it, its proportion should be 1:20. After that, it is necessary to dilute the resulting mass with a small spatula until a homogeneous consistency appears.
Preparation: putty treatment
Putty is an obligatory part of the work, preparation that is performed before painting the car with synthetic paint and immediately before priming its parts.
Proper application of putty helps eliminate scratches and dents on the vehicle body, after puttying they become almost invisible. The first layer of putty must be applied with slight pressure on the spatula, which allows you to evenly fill all the bumps and scratches on the surface.
How long will it take to wait for the putty to dry completely? Polyester putties are sometimes referred to as "fast putties" because they take 15 to 20 minutes to dry on plastic and metal. Epoxy fillers, which are used in conjunction with a hardener, dry completely in 30 minutes at an air temperature of +20 °C.
If the room is cool, then it is permissible to use a ceramic heater or a household hair dryer to speed up the drying process of the putty on the surface. After the putty has dried, you can start grinding the surface, applying primers with an airbrush, which prevent rust and are used after puttying, and painting the bottom and body of the car.
Putty is used by vehicle drivers and car service employees immediately before applying the primer mixture to the car body and is used to fill in irregularities, restore the shape of damaged metal and plastic parts.
Tips for getting the job done
On the Internet, you can find videos and step-by-step photographs that clearly demonstrate the entire process of priming a car and applying paint with your own hands. In this case, an airbrush is used - a special tool used for painting various surfaces by spraying a coloring matter.
A primer designed for processing metal and plastic, removing traces of rust, providing anti-corrosion protection, differs in its composition and technical characteristics from primers that are used for plastic or wood.
Automotive primer dries in a short period of time, it must be diluted with a solvent and a hardener. It is better to stick to the proportions that are indicated on the bank and not try to choose a different ratio of components on your own. The primer prepares the surface of metal or plastic for further painting using an airbrush, provides high adhesion of the coating. In rare cases, the primer composition can be applied to the surface in an absolutely even layer and wait after that for shrinkage to occur - a natural phenomenon that motorists face before painting their vehicle.
When a primer applied with an airbrush to a metal or plastic surface dries and begins to show its properties in relation to rust, bumps and roughness occur. After completing the work, you can compensate for these defects and make them invisible on metal and plastic if you use sandpaper. You can specify how long it will take to wait for the complete drying of the applied composition in the instructions for use, which is always attached to the purchased primer mixture.
If the body or underbody of the vehicle is heavily corroded, then it makes sense to refuse to use a modifier primer, since it is impossible to determine by eye how deeply the rust has penetrated into the metal and then make sure that you have applied a sufficient amount of a primer mixture that can convert rust into durable inert layer. In order to treat wooden parts, primers with anti-corrosion properties are never used.
Layers and drying time
So, how long does the primer mixture dry, which is applied to plastic parts and requires the use of an airbrush? Unlike putty, the drying time of the primer mixture is on average 30 minutes. Putty sometimes dries for a long time - from 24 to 48 hours. Any qualified car service worker will confirm that it is better to use several types of primer before painting a vehicle. At the beginning of painting, it is recommended to apply a phosphating primer for cars or an acid primer, after which the best "cohesion" of the surface is ensured. It should be remembered that before applying the primary primer, it will be necessary to clean the body and bottom of the car from dirt and degrease these parts with Antisilicone.
The secondary primer is applied in 2 or 3 layers. The use of a pneumatic spray gun can hardly be overestimated, because it allows you to hide bumps and scratches on the surface of the body. Sometimes auto repair shops do this work so skillfully that sanding is not required before painting the car.
It doesn't matter if you decide to perform tasks such as puttying, priming and painting your car yourself, or if you prefer to go to a car service. You can find out how long it will take to dry the applied compositions and which acrylic paint is better to use for painting your car if you study special literature or thematic sites on the Internet.
Before you start painting a car, you should decide on the type of paint, its application technology, and expert advice. The most important thing at all stages of work is strict adherence to the instructions and implementation of the recommendations of specialists.