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Tincup
11-18-2015, 10:38 AM
I bought some 1500 to try out on my recent paint job and it doesn't really seam to cut very well. My question is, what orbit DA should I be using? I was using my Air Vantage 3/32 should I use a more aggressive one? Thanks....

Len
11-18-2015, 11:18 AM
I bought some 1500 to try out on my recent paint job and it doesn't really seam to cut very well. My question is, what orbit DA should I be using? I was using my Air Vantage 3/32 should I use a more aggressive one? Thanks....

You can use either the 3/32 or the 3/16 AirVantage, the 3/16 will be more aggressive so you need to be a little more cautious. Be sure to keep the surface wet and the paper flushed while sanding. We usually use 1500 then 3000 Trizact before buffing. If the surface is real rough it may pay to start with 1000.

Tincup
11-18-2015, 12:08 PM
You can use either the 3/32 or the 3/16 AirVantage, the 3/16 will be more aggressive so you need to be a little more cautious. Be sure to keep the surface wet and the paper flushed while sanding. We usually use 1500 then 3000 Trizact before buffing. If the surface is real rough it may pay to start with 1000.

Thanks Len, the surface was already sanded by hand with 1000, I just wanted to refine the scratch. Do you use an interface pad? ( I did)

Len
11-18-2015, 01:16 PM
Thanks Len, the surface was already sanded by hand with 1000, I just wanted to refine the scratch. Do you use an interface pad? ( I did)

I use an interface pad when the surface has a tighter bend to it but on most larger bends I sand without it.

Tincup
11-20-2015, 12:29 PM
I spoke with a customer service guy from 3M. He said that you can use whatever orbit DA you prefer, and that the 1500 just takes longer to cut, longer than the 3000.

Len
11-20-2015, 12:51 PM
I spoke with a customer service guy from 3M. He said that you can use whatever orbit DA you prefer, and that the 1500 just takes longer to cut, longer than the 3000.

Yes, you can use any orbit but the bigger the orbit the more aggressive the cut will be. Also I don't understand why the more coarse 1500 sandpaper would take longer to cut than the less coarse 3000 grit. Maybe he's saying that after the 1500 is used then the 3000 won't take as long to finish the job. I use both of these grits frequently, I use the 1500 to level the surface and the 3000 to remove the 1500 scratch, I've never used the 3000 to level the surface but I'm sure it would take longer than the 1500.

skysdalimit
05-08-2016, 11:47 AM
i have lots of trouble taking out 1000 grit hand scratches with 1500 on very hard clear. I would definitely take the interface pad off and speed up the DA until you see the white slurry coming off.

68ragtop
07-20-2016, 02:28 PM
Make sure you not using too much water. Start with dry, clean panels, then squirt some water on the pad & panel. I use a drop of dish soap to a quart of water in my sprayer. If you have too much water it will tend to hydroplane. Don't let it get dry & cake on you, but you don't want it swimming either. you should see the water getting slightly milky within a few passes. 1500 is for sure quicker than 3000. 3/32 throw will be a little slower tho, so you need some patience.