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www.ultimatehandyman.co.uk Forum Index -> General DIY forum
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BarryA
Junior Member
Joined: 27 Feb 2008
Posts: 3
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 Posted: Wed Feb 27, 2008 9:43 pm Post subject: Best way to polish drill holes in perspex/acrylic |
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What is the best way to polish drill holes in perspex?
It might sound like a weird thing to worry about, but I'm mounting 5mm LED's into these holes and I'd like to polish them up a little to improve the optical clarity.
Does anyone have ideas of the best way to do this? I've considered buying a dremel and some polishing brush attachments, but I'm not certain which of the available ones (if any) would be appropriate to use with perspex.
Cheers,
Barry. |
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Teabag
Senior Member
Joined: 15 Dec 2007
Posts: 157
Location: Bedfordshire
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| Posted: Wed Feb 27, 2008 9:58 pm Post subject: |
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hi barry,
at work they polish acrylic all the time using paint t cut type products for cars, I have posted the name in another post cant recall the name atm...
a dremil type drill would be fine, when I was a tool maker we used to cut a slot in the end of a bar to slide emery cloth in to polish a drilled/bored hole, you could do the same with cloth and T cut type product rotating in the dremil type drill, put in the hole to polish it. if you cant find a ready made polishing attachment to use.
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Stoday
Electricity economics consultant
Joined: 20 Jan 2006
Posts: 3085
Location: Sitting on the Bog
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| Posted: Wed Feb 27, 2008 11:42 pm Post subject: |
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I've polished acrylic cuts with emery cloth too. Use cloth, not paper and keep it wet. Spit is best. 
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BarryA
Junior Member
Joined: 27 Feb 2008
Posts: 3
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| Posted: Mon Mar 03, 2008 12:51 pm Post subject: |
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Thanks for the suggestions.
I wasn't too worried about the sides of the drill holes, more so the end where the light would be shining through. The holes weren't drilled all the way through since a glass bowl containing water and decorative stones will be placed on top once the thing is finished.
I got the dremel along with some polishing attachments. I used the brass bristle one, followed by the nylon bristle one with some of the polishing compound. Its not come out perfect, but its a heck of a lot better before.
I'll experiment a little more and see if I can improve it.
Cheers,
Barry. |
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Wood Magnet
Senior Member
Joined: 07 Feb 2006
Posts: 3550
Location: sunderland
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| Posted: Mon Mar 03, 2008 7:17 pm Post subject: |
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Cannyfixit
Senior Member
Joined: 15 Dec 2007
Posts: 351
Location: Cheshire
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BarryA
Junior Member
Joined: 27 Feb 2008
Posts: 3
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| Posted: Tue Mar 04, 2008 10:12 am Post subject: |
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I promise to put some pics up eventually.  At the moment its nothing more than a disc of perspex with some holes in it. |
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ultimatehandyman
Site Admin
Joined: 16 Jul 2005
Posts: 9321
Location: Darwen, Lancashire
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| Posted: Tue Mar 04, 2008 5:30 pm Post subject: |
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If you could heat the holes to the correct temperature it would give a polish effect.
It's very difficult to do without damaging the perspex though.
This is how the professionals do it-
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Cannyfixit
Senior Member
Joined: 15 Dec 2007
Posts: 351
Location: Cheshire
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| Posted: Tue Mar 04, 2008 7:19 pm Post subject: |
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That interesting might have a play when i get 5 minutes 
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Jaeger_S2k
Senior Member
Joined: 19 Nov 2006
Posts: 2786
Location: North West, England, United Kingdom
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| Posted: Tue Mar 04, 2008 7:56 pm Post subject: |
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Brasso and the posh one Stoday uses does this well for visors mobile phone screens etc.
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