It can be used to remove scratches on lens, car windscreens, mobile phones & tablet screens. 

The kit include:

1.    20 grams  glass polishing solution ( dark red color, special formula for high value glass.)
2.    4 pcs wool bob , Diameter: 1''=2.5cm  or 1cm , diameter of Rod / Shank is  2.5 mm ,can be hold by electric drill.
3.    Sanding disc paper grit 320,1000,3000,7000,  3 pcs for each grit. ( Only using for deep scrach ,No need for light scrach)
4.    one cloth absorber synthetic chamois leather.
5.    one strip of Masking tape ,to prevent water inside cellphone or watch , protect / cover  the area no need polish.

Instructions for use:
    1.  Apply a little polishing solution to the glass scratch and wool bob
    2. Let the bob rub in a circular motion by using a power tool.  
    3. Work the polishing bob over the scratch, applying more polishing solution as needed.
    4. Repeat until the scratch is no longer visible.
If you can catch or feel scratches with your finger nail , you may use the sanding discs first to make the deep scratch into the light scratch.  320 , 1000 ,3000 , 7000 grit means from course polishing  to  fine polishing  ,  If scratch is not deep, you may no need  sanding discs.

How to use sanding discs to make deep scratches into light scrtches:
1:   Put the sanding disc on the hook and loop backing pad, use sanding disc grit  1000 first for coarse polishing 10---30 seconds , you will see the deep scratch getting lighter and lighter , but the glass will get many light scratch and become vague. It is OK, don't worry.
(Attention: Try your best to focus polishing on the area where the scratch is , so you will not make more new light scratch to the area where no need polish,  save your time.)
2:   Then use grit 3000 & 7000 for fine polishing ,to remove light scratch caused by the 1st step, the working area should be bigger to cover the area of 1st step.
3:   Check whether the deep scratch get lighter ad lighter, repeat above steps to get better result.
4:    In most of case, you only need 2 grit, that is Grit 1000 first for course polishing, then grit 7000 for fine polishing, other grit is just for back up method ,  you no need use all of grit sanding discs depending the depth or course of your scratches. .
5 :  Polishing result is greatly affected by your skill and scratches , you can find many video in Youtube : " how to polishing glass" to learn first.    *Be aware  excess heat and pressure may cause glass to crack.   www.youtube.com/watch?v=PfWlPHc4Ukg ， www.youtube.com/watch?v=IrdSfL8w0Zo  , www.youtube.com/watch?v=zOWdI5pKjfk  ,  www.youtube.com/watch?v=doYlaQlCloQ