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Old 18-05-2010, 10:27 AM   #1
mike s
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Default Advice needed on cleaning/sanding plastic parts

Hi everyone

I have some vac-formed flexible 1.5mm thick plastic parts.

The parts need a bit of a clean up where they have been cut to size and I'm not sure how to proceed. Can I use very fine grain sandpaper..?

Its flexible shiny plastic (like a biro pen top) that needs to stay shiny to be sprayed so I don't want to rough it up. Its just to take some excess off the edges, the main bits of the parts are fine.

Any advice will be very much appreciated.

thanks
Mike
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Old 18-05-2010, 11:12 AM   #2
MkIXHawk
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Yes, you can use it. If you scaratch it, you can polish it back to clarity using ever finer grades (up to 1500), before using a suitable polish and finishing with a final coat of Johnsons 'Kleer' acrylic floor polish

Last edited by MkIXHawk; 18-05-2010 at 02:44 PM. Reason: Correction of Typo - it's Kleer, not Kleet
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Old 18-05-2010, 11:16 AM   #3
mike s
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Quote:
Originally Posted by MkIXHawk View Post
Yes, you can use it. If you scaratch it, you can polish it back to clarity using ever finer grades (up to 1500), before using a suitable polish and finishing with a final coat of Johnsons 'Kleet' acrylic floor polish
thanks very much - for very very fine scratches can I go straight in with 1500 sandpaper..?

I live in UK so not sure I'll be able to get hold of Johnsons 'Kleet' but I'm sure there's a similar product

also do you have any advice on how to paint the parts..? I was thinking car spray-paint and then spray on layer of car polish..?

many thanks
Mike
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Old 18-05-2010, 11:27 AM   #4
DX-SFX
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Quote:
Originally Posted by mike s View Post
.... that needs to stay shiny to be sprayed.....
It's usual practice to rub shiny surfaces with fine wet and dry to provide a key for subsequent layers of paint. Is this a clear visor that needs tinting?
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Old 18-05-2010, 11:31 AM   #5
mike s
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Originally Posted by DX-SFX View Post
It's usual practice to rub shiny surfaces with fine wet and dry to provide a key for subsequent layers of paint. Is this a clear visor that needs tinting?
hi - no its going to be sprayed with metallic gold/brass - I want finished thing to look like metal

Last edited by mike s; 18-05-2010 at 04:03 PM.
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Old 22-05-2010, 08:04 AM   #6
LeeXi
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mike s - I buy Klear from my local Sainsbury store - It's labelled as Pledge, Multi Surface Wax with a blue Klear logo.

Klear might not suit the metallic finish you are going to use?

Last edited by LeeXi; 22-05-2010 at 08:08 AM.
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Old 22-05-2010, 08:44 AM   #7
DX-SFX
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It's becoming increasingly common practice to spray a base coat of gloss black on first before applying metal finishes. If you use car sprays, you can polish the surface with a cutting compound to give you the best base surface you're ever likely to get from a spraygun or airbrush.
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