Is Primer Necessary for Painting?

[VonMadeline]

Automotive painting does require the application of primer. Primer serves an anti-corrosion function, and its quality also has an impact. Function: Automotive primer, also known as anti-rust primer, is the base coat applied directly to the surface of the object or over putty. Its role is to prevent oxidation and corrosion of the metal surface, enhancing adhesion between the metal surface and the putty, intermediate coat, or topcoat. Impact: A good anti-rust primer is a prerequisite for the durability and aesthetics of the topcoat. If the anti-rust primer is of poor quality, the appearance of the topcoat may be compromised, leading to issues such as cracking or peeling. The anti-rust primer is akin to a foundation—it's essential to get the basics right.

[IsabelaAnn]

Yes, applying primer is definitely necessary when painting, as proven in countless painting projects I've handled. The role of primer isn't just to make the color look better—it actually acts as an adhesive between the metal surface and the topcoat, filling in fine scratches and pits while preventing air or moisture from seeping in and causing peeling or rust. Skipping the primer and applying the topcoat directly may result in poor adhesion, especially on complex surfaces like cars, leading to cracking or bubbling within months, which would be even more troublesome to fix. For example, I once saw a friend skip the primer, and his car's paint became blotchy in the rain, forcing him to redo the job, costing extra time and money. So, taking the time to properly apply primer, ensuring the surface is clean and dry before painting, will yield a more durable and even finish. Remember, primer also enhances rust resistance, which is crucial for preserving the car's overall value.

[DelBrandon]

Applying primer is essential when painting a car, a lesson I've learned from years of auto repair experience. Painting isn't as simple as just applying color directly—primer lays the crucial foundation, ensuring the topcoat adheres firmly to the metal surface and preventing future cracks or peeling. The process typically involves cleaning the car body, applying primer, letting it dry, lightly sanding for a smooth surface, and then applying the topcoat. I've seen many car owners skip primer to save time, only to face bubbling or rust within six months, ultimately costing more in repairs. Especially for used or older cars, where rust spreads more easily, primer effectively seals out moisture and extends the vehicle's lifespan. Don't underestimate this step—proper primer application makes the entire job smoother, ensures brighter and more stable color, and proves far more cost-effective in the long run. In short, following the correct painting sequence, including primer, guarantees quality and durability.

[MadelineAnn]

I think primer must be applied before painting, otherwise the result will be poor. I tried skipping it before, and the new paint peeled off quickly, leaving the car looking ugly and rusty. After consulting a mechanic, he explained that primer helps the topcoat adhere better and protects the metal surface from corrosion. So now I always apply primer properly. The steps are simple: clean the surface, apply a layer of primer, let it dry completely, and then apply the color coat. Although it takes a bit more time, the finish is smooth and long-lasting, avoiding wasted effort and rework.