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Acrylic Flame Polishing 101

post #1 of 7
Thread Starter 
This is a simple guide to flame polish sawn acrylic edges to get that finished look.

For this you will need..

A jet torch.
This are available everywhere,you want a blue jet to concentrate the heat

Get familiar with it first,find out how to turn it off in a hurry!

ul5Pb.jpg

3uJch.jpg

Sawn edge....not pretty.

s3V08.jpg

You want the jet tip to be just floating above the sawn edge inline with the sheet.

RxHvH.jpg

Play along the edge you want to polish,dont linger in any one spot.

E5kJ1.jpg

Done correctly the edge should fall to a uniform colour.

Q3sdC.jpg

Surface scratches can also be 'rubbed out' with the same method.

Plhdb.jpg

lQiUP.jpg

j29IM.jpg

As always,ventilation is a must!!

Practice on scrap before the workpiece and store the gas away from your work area.
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post #2 of 7
Cool! Didnt know you could get scratches out like that thumb.gif
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post #3 of 7
Cool, works on scratches biggrin.gif
post #4 of 7
Add it to the Modders Manual perhaps?
post #5 of 7
Nice, will come in handy when I make my acrylic side panels smile.gif
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post #6 of 7
Have anyone tried removing scratches from clear acrylic? Would it leave dark/burnt spots.
post #7 of 7
Heating it properly will not create dark spots. You are moving rapidly over the surface, leaving just enough heat to re-melt the fuzzy bits. If you're doing it on white acrylic, practice on a piece of scrap first as there's more of a fine line between causing it to melt and causing it to yellow. Also, way too much and it'll start to bubble.

On my cut edges, I usually sand them at least a little with a sanding stick (foam backed). I also give the edges a quick deburring so they're smoother feeling. This removes the majority of the marks before flame polishing.

If your first results are incomplete, or not quite shiny enough, let the panel cool a little and just go hit it again.

Don't do this with the protective paper on, as it'll instantly burst into flame from the heat of the torch, and that will deposit all kinds of nasty on your piece. I usually pull it back about an inch, bend it out 90 degrees, then run a straight razor blade along it (laying flat on the protective paper, cutting into the part standing up). I also usually keep a couple longer narrow pieces of scrap acrylic around, which I then clamp along the edge so the flame never hits the face of the part.
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