Move it back and forth in a continuous sweeping motion.
Repair scratches clear acrylic sheet filler.
Doing so will soften the acrylic allowing it to fill the divot created by the scratch and making it disappear.
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Focus on any rough areas and do your best to make the filler look as smooth as possible.
Apply water to the sandpaper.
Fold a piece of 800 grit wet dry sandpaper into thirds for scratches you can feel with your fingernail.
Wet sand the filler with 400 grit sandpaper to smooth out the surface.
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If the scratches are deeper than 5mm it may not be possible to polish out the scratches.
Apply acrylic finish brush the clear acrylic finish over the repair and allow two hours drying time before walking on the area.
Dip a smoother sheet of sandpaper into a container of water and rub down the filled surface.
Step 2 sand the area with a circular motion adding water as needed to keep the sandpaper wet.
You ll need suitable acrylic or plastic polish and sandpaper.
Use an extra light touch on polycarbonate.
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Use a buffing wheel mounted on a high speed bench grinder to buff out light surface scratches on both acrylic and polycarbonate plastic.
The heat softens the acrylic allowing it to flow and blend into the scratches which causes the scratches to disappear.
You can remove scratches from acrylic by polishing.
Follow the instructions outlined above in the article for sanding and polishing to remove the scratches.
Then aim your heat gun at any scratches that remain while holding it three to four inches from the surface of the acrylic.
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Protect the repair with clear acrylic finish.
Try working the sandpaper in smooth even movements to create a polished finish.