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How can I "chip" the edge of thick plexi glass to make it look like a sheet of ice? Answered

Trying to make a centerpiece for my daughter's wedding.  Need a sheet of plastic about an inch thick with the sides chipped like a piece of ice.  Going to light up a vase under it so the light glows thru the "ice".  Any ideas welcome.  Thanks

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user
Re-design (author)2010-01-23

Chip it with chisels, knives hammer etc.  When you get it to the shape you like it you'll have to polish it with a dremel or larger air tool and a lambs wool pad and rubbing compounds.  It won't look like ice until it's polished and you rub off the sharp edges.

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Re-design (author)Re-design2010-01-24

Just talked to an artist friend of mine who works with plastics.  Mostly he works with acrylic shaping it with tools.  What he suggested would be to use a dremel and grinding wheels to shape it then use grinding and polishing compounds to get it to the shine/smoothness you want.  It's rather like polishing scratches out of a car finish.

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steveastrouk (author)Re-design2010-01-24

Polishing with an oxy-acetylene torch works well, with practice...

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Re-design (author)steveastrouk2010-01-24

That's an idea I hadn't thought of.

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steveastrouk (author)Re-design2010-01-25

I should have emphasised the with practice. You have to move the torch very rapidly. I might do a very, very quick 'ible if there is any interest.

Steve

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Burf (author)2010-01-24

Call this an accidental discovery, if you will. Give the edge of plexiglass a good sharp rap with a smooth faced hammer and it will chip off, much like knapping a piece of flint.
I would stand one edge of the plexi-glass on a piece of carpeting to protect it from damage and start whacking the top edge with a hammer, knocking off the chips as  you work your way over the edge. The direct impact site of the hammer blow will have a frosted look the but rest of the flaked area will retain a transparent but irregular surface.

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lemonie (author)2010-01-24

Put it in a freezer first, it'll be more brittle and prone to ice-like fracture if it's colder.
But like other comments - at 1" hit it hard, give it a good whack

L

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RavingMadStudios (author)2010-01-23

I'd go with wood chisels. Might take a while, but I bet it would look good.

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