Scratches on the screen... Make it shiny with polishing and grinding for acrylic screens

When polishing a racing screen, which is thinner than you might imagine, start by securing the screen body firmly. Place a non-slip sheet on the workbench and set the screen and cowl so that the screen is sandwiched by the cowl. Fine scratches and deep scratches have caused the clear feeling to disappear...

Obviously deep scratches cannot be completely removed with fine-grit wet sandpaper. Here, I prepared 1200 grit wet sandpaper and tried polishing only the deep scratch areas. It was tough because there were deep scratches in multiple places, not just one.

Wet the area around the scratch with a spray bottle and intensively polish the affected area with 1200 grit wet sandpaper. Be careful with deep scratches like cracks, as overdoing it might damage the screen, so it's important to compromise to some extent.

After polishing the few deep scratches with 1200 grit wet sandpaper to make them less noticeable, I decided to polish the entire surface using an air polisher. Since this is not the final polishing, I proceeded with work at a grit of around 2000. This grit level is suitable for intermediate polishing.

The polishing paper holder of the small air polisher is made of urethane rubber to absorb impact. If you polish with a rigid holder, there is a risk of damaging the screen, such as cracking it, when it catches or wraps around, so extreme caution is necessary.

Unlike polishing by hand with fine-grit Bufflex or wet sandpaper, I carefully polished while constantly using a spray bottle to remove the acrylic shavings that flowed out during polishing, taking care not to leave fine scratches on the screen.

Unlike polishing by hand with fine-grit Bufflex or wet sandpaper, I carefully polished while constantly using a spray bottle to remove the acrylic shavings that flowed out during polishing, taking care not to leave fine scratches on the screen.

I used a small air polisher. This might be the optimal size polisher for polishing motorcycle parts using an air compressor. I used a washed wool buff. Wash the ones you used before.

Be careful not to press too hard, as the wool buff can get hot and deform the acrylic screen. When using a power polisher, the key to success is to start gently, regardless of the size. Don't overdo it.

After finishing the outside of the screen, scratches on the inside started to become noticeable. Proceed with the work while one person holds the cowl body on the workbench. A stable working environment seems to be important for this type of work. Here, the electric polisher for finishing comes into play.

When polishing with finishing compound, it's best to place your hand on the back of the screen to check if it's getting too hot. Pressing too hard will generate heat, which is not good. It shines brilliantly, a world of difference from before the work.