Unigrit 3" Sanding & Finishing Discs

Grifffx4

Grifffx4

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How long do these discs last using a DA?

I use them for headlight restoration and I'm not sure when to dispose of each disc.

I usually use 1 3000 or 1000 finishing disc per pair of light before I discard.

With the sanding disc I use one per light before discarding.

Am I throwing money away?
 
I can see the build up but I toss them because I'm unsure if they are cutting like the should even if I rinse them off.

I guess my question is does the grit wear off quickly or does it take a lot of abuse to use them up?
 
I find the 3000 Unigrit and Trizact both last longer than coarser discs. I can't do more than one lens with 320-1500 Unigrit or 2000 World Abrasives foil, but can easily do two lenses with either 3000.
 
SameGuy said:
I find the 3000 Unigrit and Trizact both last longer than coarser discs. I can't do more than one lens with 320-1500 Unigrit or 2000 World Abrasives foil, but can easily do two lenses with either 3000.
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Which grits are you using dry?
 
Grifffx4 said:
I can see the build up but I toss them because I'm unsure if they are cutting like the should even if I rinse them off.

I guess my question is does the grit wear off quickly or does it take a lot of abuse to use them up?
Click to expand...

You should be damp sanding with anything above P1000

Maybe you should try more moisture and spraying the residue off of the disc more often
 
320/500/800 dry. 1000 and above are wet. I normally don't use every grade, and don't always start at the coarsest.
 
SameGuy said:
I find the 3000 Unigrit and Trizact both last longer than coarser discs. I can't do more than one lens with 320-1500 Unigrit or 2000 World Abrasives foil, but can easily do two lenses with either 3000.
Click to expand...


Ok, that's what I am doing.

However I damp sand with all of them. 500/800/1000/3000
 
I don't know if wet sanding is even suggested with the 500 & 800 papers

Are they waterproof?

Interested to find out
 
Yes they are. I've tried both ways. At low speeds on the GG3 the coarser ones don't need either the cooling or the lubrication, but it does keep dust down and cleans the medium.
 
I've been experimenting buffing out 1500, and 1000 on a PC. To start stopping at 1500 instead of 3000.

So far so good
 
This is 1000 grit being removed with my porter cable.

b00b3dee024ff7c67f6683ab8ad889da.jpg
 
SameGuy said:
Yes they are. I've tried both ways. At low speeds on the GG3 the coarser ones don't need either the cooling or the lubrication, but it does keep dust down and cleans the medium.
Click to expand...


I get residue build up on the 500/800 damp sanding. Very heavy on the 500 especially when just starting on the lens but it does help with dusting.
 
I tried finishing at 1500 with the same setup. PC, M100 etc..., and thought that was easy.

So I then thought, we'll just to test it out and see how this setup holds up against 1000 sanding grit. I wad able to do it, but the time it took to remove 1000 sanding grit outweighed the required results to do this task.

So basically just for testing purposes and to see if I could stop using 3000 as much cos they can be costly.
 
Art, you promised you would stay off the Forum while you are on the weekend trip with "your Lady"
 
Has anyone tried something like Scholl's S0 Extreme Cut, or the other "extreme", "super", "heavy" cut compounds for this like Art?

Scholl Concepts S0 Extreme Cut Matting Compound 1 kg

Scholl Concepts Asia

Not quite sure what grit it's supposed to remove. I believe their claim is "liquid sandpaper" equaling 1000 grit. Or at least that's what I'm getting from it.

There are others that claim to remove down to 600 grit. If these work well, I believe they would be a cheaper alternative to the expensive higher grit sanding disks. Although some purist may say you are not truly leveling, or providing true optical clarity with this process.
 
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