Maker Pro
Maker Pro

Removing scratches from clear instrument plastic

dude

Apr 15, 2014
35
Joined
Apr 15, 2014
Messages
35
A couple of weeks a ago I accidentally put a great big deep scratch onto my 187's LCD glass with a screwdriver. I'm not normally that much of a klutz but hey I repair more than I wreck. I wasn't too worried as I knew I could get it out but it's still been annoying the hell out of looking at it as it cast a big shadow onto the LCD. Finally got the chance to do it this morning.
My method for polishing things like that is a soft cotton cloth and a small amount of Brasso. Polish in a circular motion and make sure to mask the edges with tape (I use scotch tape) as you don't want Brasso running into any crevices as you'll have a hell of a time getting it out later.
For restoring old instrument dials etc, that's how I do it and with some elbow grease you can get them looking like new.
Here's the 187, anything you see on it is just lint from the cotton cloth.
 

Attachments

  • F187.jpg
    F187.jpg
    26.7 KB · Views: 135

Jagtech

Feb 22, 2014
43
Joined
Feb 22, 2014
Messages
43
Is that the actual LCD glass that's scratched, or is there a clear plastic protective face in front of it? IIRC, my 77 has a separate plastic face, which you can polish with some rouge and a buffing wheel.
 

dude

Apr 15, 2014
35
Joined
Apr 15, 2014
Messages
35
The plastic face, LCD sits under that. Yes rouge is also good although never tried it on plastic, I know its good for giving steel a mirror finish as a final polish, either in paste form or just plain old iron oxide. There is also pumice powder, talcum, graphite, even cigarette ash, depends what you're doing. I don't use a buffing wheel on instruments myself as its very easy to overdo it. That 77 is a great meter :cool:
 

davenn

Moderator
Sep 5, 2009
14,016
Joined
Sep 5, 2009
Messages
14,016
just clarify ... you removed the scratch from a plastic face ? not a glass one as mentioned in your first post ?
 

dude

Apr 15, 2014
35
Joined
Apr 15, 2014
Messages
35
yep, the clear plastic face, uppermost. sorry about that.
 

davenn

Moderator
Sep 5, 2009
14,016
Joined
Sep 5, 2009
Messages
14,016
cool :)

do you have a before pic so we can see the initial damage ?

D
 

dude

Apr 15, 2014
35
Joined
Apr 15, 2014
Messages
35
No as it occurred to me to post this up only after I finished. You can remove some pretty deep scratches with this method, its just a matter of being patient. It took me about 40 minutes on this one. Just listen to some music and noodle away.
 

Morgan

Jun 22, 2014
16
Joined
Jun 22, 2014
Messages
16
Meguires Plast-X is also very good for removing scratches from plastic, so is toothpaste!
 

davenn

Moderator
Sep 5, 2009
14,016
Joined
Sep 5, 2009
Messages
14,016
Meguires Plast-X <--- never heard of that ?

Toothpaste, yes a good gentle cleaning abrasive :)

D
 

davenn

Moderator
Sep 5, 2009
14,016
Joined
Sep 5, 2009
Messages
14,016
ahhh Ok maybe native to your country ??

where are you from ? .... put it in your profile

don't want street addy LOL just country will do

D
 
Top