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Old 10-23-2012, 04:31 AM   #1 
Cinderwolf's Avatar
Join Date: Dec 2011
Location: Richmond BC
Acrylic Scratch removal?

So apparently a grain of sand got under my magnet cleaner and left a huge scratch in my 6 gal acrylic tank : ( Any way to fix this? It's right across the front panel and looks like crap now
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Old 10-23-2012, 04:34 AM   #2 
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Join Date: Nov 2011
Location: Austin, Texas
Work with a clean surface. Use only products recommended for cleaning acrylic (see Resources below). Household cleaning products, like window cleaners, that contain ammonia are harsh and should not be used. Ammonia can make the acrylic look cloudy. Products not specially designed to clean acrylic can actually make small scratches on the surface. Do not use products that contain bleach or acetone either.

Blow off any dust or loose particles of dirt before you begin. Using a dry cloth will rub dust and dirt into the acrylic instead of removing it. Rubbing the dirt can make more scratches on the surface. Wet a soft cloth or sponge with a solution of warm water and a mild, liquid dish detergent to wipe the surface. Do not use paper towels either wet or dry, as they are well known for scratching acrylic surfaces.

Stay away from using abrasive cleaners and cleaning pads. Use a mild abrasive specifically designed for removing fine scratches from acrylic. Regular abrasive cleaners will dull the surface. Silver polish can be used as an alternative to polish out scratches if you do not have an acrylic cleaner on hand. However, test it on the surface first before using. Silver polish usually works well to remove light scratches from acrylic watch crystals.

Try using car wax to smooth out fine scratches. You want to use the rubbing compound type. Apply wax and buff out scratches that are deep enough that you can feel them with your fingernail. Buff in a round circular motion until the scratches disappear.

Sand deeper scratches with wet/dry sandpaper. Work with an extra fine grit paper such as 600 or 800 grade to smooth the surface. Saturate the paper in warm, soapy water before sanding. This helps keep the dust from scratching the acrylic more. Lightly sand the scratched area to a feathered edge. Finish by going over the surface again with an even finer grit sand paper like 1200 or 1500 grade.

Empty the tank of fish and water. If you are removing scratches on the inside, it produces particles of acrylic through sanding that may not be good for your fish.

Sand in one direction only with 120 or 220 grit wet/dry sandpaper for deep grooves, 320 grit for scratches that can be felt with a fingernail, 1800 or 400 grit for fine scratches, 2400 or 3200 for light scuff marks, or 4000 or 6000 grit for very fine scratches.

After the first sanding, move to the next grade of sandpaper and switch sanding direction.

Continue working through the grades of sanding until you reach the finest grit. Switch direction with each grit. Never work in a circular motion, which can cause swirls on the acrylic surface.

Expand the area you are sanding by about 4 inches with each grade to avoid distortion from sanding down one small point.

Clean the aquarium with clean water and a drop of detergent once the surface has been restored to your satisfaction. Use flannel for cleaning and drying, and avoid paper towels.

Last edited by polukoff; 10-23-2012 at 04:36 AM.
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