Cracks
Cracks in most plastic sheet can be stopped by drilling a small (1.5 mm or
1/16" diameter) hole at the end of the crack. This will prevent the
crack from travelling further into the sheet.
Scratch Removal
Most fine scratches can be removed from acrylic and some other plastics
with a mild abrasive polish such as Meguiars #17 or #18 Heavier scratches,
such that you can feel with your fingernail, will require some elbow
effort to remove with a bit of sanding and buffing. A series of grits
(150,400,600) followed by a buffing wheel and available buffing compound,
will restore the acrylic.
Care must be taken in polishing plastics, some materials such as
polycarbonate or HIPS will burn or whiten when polished.
Cleaning
The most common problem that people encounter with acrylic is the use of
incorrect cleaners. Never use cleaners containing ammonia. Cleaners such
as Windex will harm acrylic. Use only products specifically recommended
for cleaning acrylic such as Meguiars #17 or #18 and a soft cloth. City
Plastics stock both these products. Never use a dry cloth or your hand to
clean acrylic. First, blow the dust or dirt off, or use water and a
soft cloth to wash the dirt off. Then use a recommended cleaner to
complete the job. A solution of detergent and warm water will remove
stubborn dirt easily without harming the acrylic if you've run out of
Meguiars #17 or #18
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Molding
- The guide to polymer processing technology,
materials, additives & equipment -
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