Minor scratches on automotive glass don't have to be permanent if they're treated correctly.
Every driver wants their car's glass to look as clear and flawless as the day the vehicle rolled off the lot. That's perfectly understandable. But over time, tiny scratches and swirl marks inevitably begin to appear. Left unchecked, these imperfections can dull the appearance of the vehicle and make the glass look aged. Fortunately, light surface damage can often be corrected through polishing.
Before getting started, you'll need a few basic supplies. A dedicated polishing machine is ideal, but a standard drill fitted with a felt polishing pad can also work. The tool's speed should be kept below 1,500 rpm.
You'll also need glass polishing compound or abrasive powder, polishing pads of varying firmness, a washable marker, plastic sheeting, painter's tape, glass cleaner, and several paper towels.
The first step is to thoroughly clean and dry the glass. Once that's done, protect nearby body panels and surrounding surfaces by covering them with plastic sheeting secured with tape.
Next, mark the scratches with a marker so they're easier to locate during the polishing process.
One important note: this method is intended for light scratches only. It will not repair chips or deep damage.
Apply a small amount of polishing compound to the damaged area. Work on sections no larger than about 14 by 14 inches, since the material tends to dry out quickly.
Using the polishing tool at roughly a five-degree angle and applying virtually no pressure, make smooth and continuous movements across the surface. Avoid staying in one spot for too long.
To prevent overheating, periodically spray the glass with water using a spray bottle.
After finishing one section, move on to the next. The key is to keep the tool moving constantly. Pausing in one area can create uneven results and potentially damage the surface.
Once the entire job is complete, clean the glass thoroughly and inspect the results.
Polishing can work wonders on fine scratches and hazing, but it has its limits. Deep scratches and chips typically require professional repair or even glass replacement. Trying to remove severe damage with aggressive polishing can do more harm than good, so it's important to know when a DIY fix is no longer enough.