What to Do If Small Bubbles Appear on Car Paint After One Year?

[AngelinaLee]

If small bubbles appear on car paint after one year, it is best to take it to a repair shop for maintenance. Below is relevant information about small bubbles appearing on car paint after one year: 1. Bubbles are influenced by external conditions: Initially, they may be invisible to the naked eye, but they already compromise the integrity of the coating. Over time, moisture causes the coating to rust, and there is no remedy other than removing the coating and repainting. 2. Remedial methods: It is recommended to visit a 4S shop to check for solutions and see if the car paint warranty has expired; if it is a used car, it is advisable to directly scrape off the paint and repaint; if the car was previously repainted and the painting process was not done properly, bubbling may occur.

[LaRonan]

I encountered the same issue last month when small bubbles suddenly appeared on my car door. At the repair shop, the mechanic told me this is a typical post-painting defect. The main cause is inadequate cleaning of the metal surface before painting, leaving behind moisture, grease, or dust residue. High environmental humidity during painting can also lead to this. Those bubbles are actually signs of underlying corrosion, requiring complete sanding and repainting. I tried the DIY touch-up method I found online, but the bubbles reappeared within two months. I recommend getting it professionally fixed immediately before rust spreads. Nowadays, reputable paint shops offer a one-year warranty—remember to bring the work order for warranty claims.

[KhloeLee]

The paint sprayed last year is now bubbling? It's most likely due to cutting corners during the application. The base coat wasn't fully dry before the top coat was applied, or sloppy sanding left pinholes, allowing moisture to seep in and cause blisters. Last week, my car roof had the same issue. The mechanic used a grinder to sand down the entire bubbled area, revealing rust spots underneath. He said it's essential to completely remove rust and degrease, then apply epoxy primer and color coat in layers, followed by infrared baking. Simply patching the surface for convenience will lead to bubbles reappearing quickly. Also, avoid washing the car or exposing it to rain right after painting—wait at least three days for proper curing.

[DeCorey]

I know this issue all too well! Paint bubbles typically stem from three sources: rust on the metal substrate (especially in coastal areas or regions using de-icing salts), contamination between paint layers, or improper solvent evaporation. The repair process is quite meticulous—use 800-grit sandpaper to grind through the bubble, scrape away all corrosion, apply metal converter to prevent rust, then fill with body filler and sand smooth. DIY repairs are challenging, so I recommend driving straight to a professional auto body shop. Their specialized equipment can precisely control booth temperature and humidity. Insist on using two-component primer—it provides three times the adhesion strength of standard paint. Don't skimp on cost; preserving the factory paint finish is worth the investment.

[VanJaxon]

Don't panic about paint bubbles, but address them promptly. My mechanic friend explained it's paint delamination—contaminants underneath expand with heat and lift the paint film. Avoid folk remedies like puncturing with needles and applying wax; they're temporary fixes. The key is sanding down to bare metal, applying rustproofing, then at least three coating layers: rustproof primer, surfacer primer, and base coat + clear coat. Water-based paints are recommended—eco-friendly and fast-drying. After my repair last year, I added PPF (paint protection film), and there's been no recurrence for two years. Daily parking tip: avoid tree sap and bird droppings—these are the most corrosive to paint.