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Help please! Gear indicator glasses are scratched.

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Help please! Gear indicator glasses are scratched.

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Old 02-12-19, 10:42 AM
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Orkun KnighTR34
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Help please! Gear indicator glasses are scratched.

Hi Guys!
I have Shimano Alivio M410 brake and shift levers on my bike. I tried wet sanding with 800, 1200, 1500 and 2000 grit sandpapers in order. After sanding, I applied fine cut rubbing compound by shoes sponge. Scratches are removed but indicator glasses look matte. How can I get rid off matte look of them? Please help me.
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Old 02-12-19, 11:05 AM
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fietsbob 
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look for the stuff made for plastic covers over car headlights...??
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Old 02-12-19, 11:11 AM
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Orkun KnighTR34
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Originally Posted by fietsbob View Post
..

look for the stuff made for plastic covers over car headlights...??
I agree with you. I'll try.
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Old 02-12-19, 11:12 AM
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Toothpaste.
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Old 02-12-19, 01:42 PM
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Orkun KnighTR34
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Originally Posted by AnkleWork View Post
Toothpaste.


It's your mentality I think
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Old 02-12-19, 01:53 PM
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Originally Posted by Orkun KnighTR34 View Post
Hi Guys!
I have Shimano Alivio M410 brake and shift levers on my bike. I tried wet sanding with 800, 1200, 1500 and 2000 grit sandpapers in order. After sanding, I applied fine cut rubbing compound by shoes sponge. Scratches are removed but indicator glasses look matte. How can I get rid off matte look of them? Please help me.
If the plastic is acrylic, get the Novus polish kit (3 different compounds). Iíve restored crashed motorbike windscreens that looked like new. If the plastic is polycarbonate, fugediboutit.
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Old 02-12-19, 02:02 PM
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Heaven forbid the Maguires Acrylic & Plastic polish cost more than the acrylic lens itself.

Do a search for the parts breakdown .pdf of your particular shifter. Search for the shifter by the model number embossed on the shifter, itself. When you find it, plug the lens component number into your favorite sort engine. SJS cycles or Modern bike probably has it for under $5

You already have them disassembled & washed with soap & water, correct?

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Old 02-12-19, 02:04 PM
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Orkun KnighTR34
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What about car headlight cleaner and polisher wax?
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Old 02-12-19, 02:10 PM
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Good luck. But, do you really look at gear indicators? I suspect that you don't need them.
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Old 02-12-19, 02:39 PM
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Originally Posted by fietsbob View Post
..

look for the stuff made for plastic covers over car headlights...??
Great suggestion !
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Old 02-13-19, 07:40 AM
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Originally Posted by base2 View Post
Heaven forbid the Maguires Acrylic & Plastic polish cost more than the acrylic lens itself.

Do a search for the parts breakdown .pdf of your particular shifter. Search for the shifter by the model number embossed on the shifter, itself. When you find it, plug the lens component number into your favorite sort engine. SJS cycles or Modern bike probably has it for under $5

You already have them disassembled & washed with soap & water, correct?
Too small a part on too inexpensive a part for Shimano to stock a number for it. Likely, if it's even available, it will be part of the entire shifter cover assembly.

Polishing plastic is difficult, but not impossible. Maguire's (at the auto store) makes a plastic polishing compound. Works pretty well, once you've gotten the scratches out. Typically, you would use a slightly-wet foam sponge to apply it. Tape off the areas around the windows, and apply it with the shifter assembled; it'll go faster not trying to keep a hand on a tiny piece of plastic.
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Old 02-14-19, 03:46 PM
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+1 on toothpaste, as long as it's not whitening. Seriously. Toothpaste is a mild abrasive, and a lot cheaper than those 'kits' that restore your headlights.

It's worth a try before you spend $$$ on anything else.
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