Does a 7-year-old car need full-body polishing?

[DelIvan]

It depends. Mainly on whether the car paint is blurred or not. Here is the relevant introduction about car polishing: Overview: Car polishing is a process in car beauty treatment where polishing is performed before waxing, glazing, or coating. This is because glazing and coating require polishing first, and only a finely polished car can achieve a mirror-like finish. This is a necessary step for glazing. Advantages: Polishing itself does not harm the car paint; on the contrary, it can better protect the paint. It can remove oxidized paint and various foreign substances on the car body, eliminate fine scratches on the paint surface, and treat minor damages and stains on the car paint.

[McRyder]

I've been driving my own car for almost eight years now, and honestly, a full car polish depends on the situation. If the paint only has minor scratches or swirl marks, a regular wax can restore its shine, and there's no need to go all out. But if the area around the door handles has turned white from fingernail scratches or the bumper has developed a frosted oxidation layer, a spot polish is more cost-effective. Polishing the entire car every year can actually damage the paint, just like how over-exfoliating thins your skin. Last time I saw my neighbor's car, which had been polished too frequently, the paint was so thin that the primer showed through under sunlight—it was really heartbreaking.

[Curtis]

Last week when I got my car washed, the technician pointed out noticeable oxidation on the rear fender. Actually, paint aging is quite common for a seven-year-old vehicle. Whether a full car polish is needed largely depends on usage environment - if parked outdoors long-term, rain and tree sap can corrode the paint, often causing dull white spots on the roof and hood. I recommend first feeling the paint surface by hand: if it's rough like sandpaper or if rainwater no longer beads up but spreads out, then polishing would be effective. However, never casually polish a car with ceramic coating, as it would grind off the protective layer. My ceramic-coated car still maintains excellent water beading after three years, which shows the benefits of proper maintenance.

[OEmily]

Whether to polish a seven-year-old car depends on three key points: first, whether deep scratches have exposed the primer—if so, polishing won't help; second, whether there are orange peel textures on the paint, especially around the door handles; and third, whether the gloss is even when illuminated with a flashlight. In fact, superficial scratches like swirl marks can be repaired with abrasive-containing coating agents. Last month, I personally treated the hood by applying a milky coating agent in circular motions, restoring a mirror-like finish in just half an hour. However, it's important to watch out for aging door seal issues, as cracked seals at this age can significantly impact noise insulation and waterproofing.